quartzose

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Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 223
by James St. John

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49972208773.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49972208773_9c8ebfe2eb_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 223 / James St. John</span>

サイズ変更など

Conglomerate & sandstone (Sharon Formation, Lower Pennsylvanian; Virginia Kendall Ledges, Ohio, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/42511394375.html" target="_blank"><img src="http://farm2.static.flickr.com/1790/42511394375_71620ed41d_m.jpg" alt="" /></a><br />Conglomerate & sandstone (Sharon Formation, Lower Pennsylvanian; Virginia Kendall Ledges, Ohio, USA) 6 / James St. John</span>

サイズ変更など

Green Harlequin Quartzite (fuchsitic quartzite)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/14627039700.html" target="_blank"><img src="http://farm3.static.flickr.com/2939/14627039700_362085a64f_m.jpg" alt="" /></a><br />Green Harlequin Quartzite (fuchsitic quartzite) / James St. John</span>

サイズ変更など

Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 8
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/18787622650.html" target="_blank"><img src="http://farm4.static.flickr.com/3893/18787622650_e2a09a4d84_m.jpg" alt="" /></a><br />Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 8 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 206
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49972118413.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49972118413_3a3aa8c1da_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 206 / James St. John</span>

サイズ変更など

Petroleum exploration seismic survey in Ohio (March 2019)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/50106690456.html" target="_blank"><img src="http://farm0.static.flickr.com/0/50106690456_f2e7e78c11_m.jpg" alt="" /></a><br />Petroleum exploration seismic survey in Ohio (March 2019) / James St. John</span>

サイズ変更など

Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 8
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/24476880569.html" target="_blank"><img src="http://farm2.static.flickr.com/1697/24476880569_95070d05d5_m.jpg" alt="" /></a><br />Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 8 / James St. John</span>

サイズ変更など

Horse Creek Flint (attributed to the Ft. Payne Formation, Lower Mississippian; near Savannah, Tennessee, USA) 13
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31961583996.html" target="_blank"><img src="http://farm1.static.flickr.com/277/31961583996_5827416b1c_m.jpg" alt="" /></a><br />Horse Creek Flint (attributed to the Ft. Payne Formation, Lower Mississippian; near Savannah, Tennessee, USA) 13 / James St. John</span>

サイズ変更など

Fossiliferous chert (Chatham, Ohio, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51206615029.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51206615029_c12f565ec4_m.jpg" alt="" /></a><br />Fossiliferous chert (Chatham, Ohio, USA) 3 / James St. John</span>

サイズ変更など

Pudoproetus auriculatus fossil trilobite (Byer Sandstone, Lower Mississippian; Rt. 16 roadcut, 1.45 miles south of Granville, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15077886548.html" target="_blank"><img src="http://farm4.static.flickr.com/3849/15077886548_202b3b74c7_m.jpg" alt="" /></a><br />Pudoproetus auriculatus fossil trilobite (Byer Sandstone, Lower Mississippian; Rt. 16 roadcut, 1.45 miles south of Granville, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Shinarump Conglomerate over De Chelly Sandstone (Upper Triassic over Lower Permian; Canyon de Chelly, Arizona, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51953527401.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51953527401_f841b630fa_m.jpg" alt="" /></a><br />Shinarump Conglomerate over De Chelly Sandstone (Upper Triassic over Lower Permian; Canyon de Chelly, Arizona, USA) 3 / James St. John</span>

サイズ変更など

Zaleski Flint (Middle Pennsylvanian; west of Creola, northern Vinton County, Ohio, USA) 40
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/32579294548.html" target="_blank"><img src="http://farm5.static.flickr.com/4805/32579294548_cd06704e80_m.jpg" alt="" /></a><br />Zaleski Flint (Middle Pennsylvanian; west of Creola, northern Vinton County, Ohio, USA) 40 / James St. John</span>

サイズ変更など

Fountain Formation (Pennsylvanian to Permian; Manitou Springs, Colorado, USA) 108
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49280524601.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49280524601_8a70a2da25_m.jpg" alt="" /></a><br />Fountain Formation (Pennsylvanian to Permian; Manitou Springs, Colorado, USA) 108 / James St. John</span>

サイズ変更など

Vanport Flint (Middle Pennsylvanian; Roy Miller flint pit, Flint Ridge, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/26117233518.html" target="_blank"><img src="http://farm5.static.flickr.com/4648/26117233518_9efffbe1d7_m.jpg" alt="" /></a><br />Vanport Flint (Middle Pennsylvanian; Roy Miller flint pit, Flint Ridge, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Granule-pebble horizon in sandstone (Dundee Sandstone, Middle Pennsylvanian; cliffs along Walnut Creek Bottom Road, west of Dundee, Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23859492695.html" target="_blank"><img src="http://farm1.static.flickr.com/629/23859492695_9eeb2312ca_m.jpg" alt="" /></a><br />Granule-pebble horizon in sandstone (Dundee Sandstone, Middle Pennsylvanian; cliffs along Walnut Creek Bottom Road, west of Dundee, Ohio, USA) / James St. John</span>

サイズ変更など

Bruneau Sand Dunes (Snake River Plain, Idaho, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49412902476.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49412902476_57edc10a34_m.jpg" alt="" /></a><br />Bruneau Sand Dunes (Snake River Plain, Idaho, USA) 1 / James St. John</span>

サイズ変更など

Sauropod dinosaur footprint in lacustrine sandstone (Morrison Formation, Upper Jurassic, western side of Dinosaur Ridge, Colorado, USA) 8
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/22195571422.html" target="_blank"><img src="http://farm6.static.flickr.com/5685/22195571422_cbf204de6f_m.jpg" alt="" /></a><br />Sauropod dinosaur footprint in lacustrine sandstone (Morrison Formation, Upper Jurassic, western side of Dinosaur Ridge, Colorado, USA) 8 / James St. John</span>

サイズ変更など

Overturned crossbeds in sandstone (Sharon Formation, Lower Pennsylvanian; Virginia Kendall Ledges, Ohio, USA) 7
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/42690434874.html" target="_blank"><img src="http://farm2.static.flickr.com/1782/42690434874_778de3a081_m.jpg" alt="" /></a><br />Overturned crossbeds in sandstone (Sharon Formation, Lower Pennsylvanian; Virginia Kendall Ledges, Ohio, USA) 7 / James St. John</span>

サイズ変更など

Uinta Fremont Indian petroglyphs (~1000 years old) (Dinosaur National Monument, Utah, USA) 22
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/22497365389.html" target="_blank"><img src="http://farm6.static.flickr.com/5657/22497365389_d02ae941cb_m.jpg" alt="" /></a><br />Uinta Fremont Indian petroglyphs (~1000 years old) (Dinosaur National Monument, Utah, USA) 22 / James St. John</span>

サイズ変更など

Potsdam Sandstone building stone (Upper Cambrian to Lower Ordovician) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49901750132.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49901750132_8971390ce7_m.jpg" alt="" /></a><br />Potsdam Sandstone building stone (Upper Cambrian to Lower Ordovician) 3 / James St. John</span>

サイズ変更など

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 12
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34728325871.html" target="_blank"><img src="http://farm5.static.flickr.com/4244/34728325871_2b54ee35f1_m.jpg" alt="" /></a><br />Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 12 / James St. John</span>

サイズ変更など

Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/18354708183.html" target="_blank"><img src="http://farm1.static.flickr.com/404/18354708183_cfb0023420_m.jpg" alt="" /></a><br />Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 3 / James St. John</span>

サイズ変更など

Congressman Bridge (Natural Bridges National Monument, Utah, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8287017759.html" target="_blank"><img src="http://farm9.static.flickr.com/8355/8287017759_848a2436e1_m.jpg" alt="" /></a><br />Congressman Bridge (Natural Bridges National Monument, Utah, USA) 5 / James St. John</span>

サイズ変更など

De Chelly Sandstone (Lower Permian; Canyon de Chelly, Arizona, USA) 21
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51957978896.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51957978896_b21d3a42ca_m.jpg" alt="" /></a><br />De Chelly Sandstone (Lower Permian; Canyon de Chelly, Arizona, USA) 21 / James St. John</span>

サイズ変更など

Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 64
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/33427739285.html" target="_blank"><img src="http://farm4.static.flickr.com/3774/33427739285_fdd8ab7ac7_m.jpg" alt="" /></a><br />Flint (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, Flint Ridge, Ohio, USA) 64 / James St. John</span>

サイズ変更など

Mudshale clasts in quartz-pebble conglomerate (Sharon Conglomerate, Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 21
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/37073269333.html" target="_blank"><img src="http://farm5.static.flickr.com/4452/37073269333_fd4034feed_m.jpg" alt="" /></a><br />Mudshale clasts in quartz-pebble conglomerate (Sharon Conglomerate, Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 21 / James St. John</span>

サイズ変更など

Quartzite (Ediacara Sandstone Member, Rawnsley Quartzite, Neoproterozoic; Mayo Gorge, South Flinders Ranges, South Australia) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/26419974065.html" target="_blank"><img src="http://farm2.static.flickr.com/1670/26419974065_e964b3f655_m.jpg" alt="" /></a><br />Quartzite (Ediacara Sandstone Member, Rawnsley Quartzite, Neoproterozoic; Mayo Gorge, South Flinders Ranges, South Australia) 1 / James St. John</span>

サイズ変更など

Quartz-pebble conglomerate ("Sharon Conglomerate", Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 43
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/26244648937.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/26244648937_ec15c2cf31_m.jpg" alt="" /></a><br />Quartz-pebble conglomerate ("Sharon Conglomerate", Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 43 / James St. John</span>

サイズ変更など

Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/24549004410.html" target="_blank"><img src="http://farm2.static.flickr.com/1701/24549004410_a134696171_m.jpg" alt="" /></a><br />Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 3 / James St. John</span>

サイズ変更など

Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 28
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/24844499945.html" target="_blank"><img src="http://farm2.static.flickr.com/1562/24844499945_97af5d90fd_m.jpg" alt="" /></a><br />Differentially cemented & eroded sandstone (member C, Uinta Formation, Eocene; Fantasy Canyon, Utah, USA) 28 / James St. John</span>

サイズ変更など

Hillsboro Sandstone (Lower Devonian; northwest of Sinking Spring, Ohio, USA) 9
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/48950106213.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/48950106213_c450050375_m.jpg" alt="" /></a><br />Hillsboro Sandstone (Lower Devonian; northwest of Sinking Spring, Ohio, USA) 9 / James St. John</span>

サイズ変更など

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; railroad cut west of Black Hand Gorge, Ohio, USA) 10
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/30774609130.html" target="_blank"><img src="http://farm6.static.flickr.com/5568/30774609130_bf589bc5ce_m.jpg" alt="" /></a><br />Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; railroad cut west of Black Hand Gorge, Ohio, USA) 10 / James St. John</span>

サイズ変更など

De Chelly Sandstone (Lower Permian; Canyon de Chelly, Arizona, USA) 93
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/52013246910.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/52013246910_b0ce863b42_m.jpg" alt="" /></a><br />De Chelly Sandstone (Lower Permian; Canyon de Chelly, Arizona, USA) 93 / James St. John</span>

サイズ変更など

Bowerston # 1 oil well (Hanover, Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/47446509962.html" target="_blank"><img src="http://farm8.static.flickr.com/7927/47446509962_b035e6c0a7_m.jpg" alt="" /></a><br />Bowerston # 1 oil well (Hanover, Ohio, USA) / James St. John</span>

サイズ変更など

Skolithos trace fossils in quartzose sandstone (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/19003425521.html" target="_blank"><img src="http://farm4.static.flickr.com/3777/19003425521_0b4e3f3fd3_m.jpg" alt="" /></a><br />Skolithos trace fossils in quartzose sandstone (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 4 / James St. John</span>

サイズ変更など

Tri-cone rotary driling bit 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31422017531.html" target="_blank"><img src="http://farm6.static.flickr.com/5493/31422017531_592ebac2d6_m.jpg" alt="" /></a><br />Tri-cone rotary driling bit 1 / James St. John</span>

サイズ変更など

Skolithos linearis burrows in sandstone (Clinch Formation, Lower Silurian; Clinch Mountain, Tennessee, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15352225548.html" target="_blank"><img src="http://farm6.static.flickr.com/5598/15352225548_5cdc3b93b2_m.jpg" alt="" /></a><br />Skolithos linearis burrows in sandstone (Clinch Formation, Lower Silurian; Clinch Mountain, Tennessee, USA) 5 / James St. John</span>

サイズ変更など

Flint-knapped spearpoint (Burlington Formation, Mississippian) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51430606996.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51430606996_f12aa27005_m.jpg" alt="" /></a><br />Flint-knapped spearpoint (Burlington Formation, Mississippian) 5 / James St. John</span>

サイズ変更など

Dry tributary under Congressman Bridge (Natural Bridges National Monument, Utah, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8287014461.html" target="_blank"><img src="http://farm9.static.flickr.com/8491/8287014461_8138bddd67_m.jpg" alt="" /></a><br />Dry tributary under Congressman Bridge (Natural Bridges National Monument, Utah, USA) 1 / James St. John</span>

サイズ変更など

Reconstruction of sauropod dinosaurs making footprints in sand (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8277690743.html" target="_blank"><img src="http://farm9.static.flickr.com/8215/8277690743_731f7baaf8_m.jpg" alt="" /></a><br />Reconstruction of sauropod dinosaurs making footprints in sand (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) 1 / James St. John</span>

サイズ変更など

Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 15
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/34728287171.html" target="_blank"><img src="http://farm5.static.flickr.com/4224/34728287171_237af72371_m.jpg" alt="" /></a><br />Black Hand Sandstone (Lower Mississippian; Rock House, Hocking Hills, Ohio, USA) 15 / James St. John</span>

サイズ変更など

Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; old quarry at Black Hand Gorge, Ohio, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31027338351.html" target="_blank"><img src="http://farm6.static.flickr.com/5743/31027338351_c928f19d74_m.jpg" alt="" /></a><br />Quartzose sandstone (Black Hand Sandstone, Lower Mississippian; old quarry at Black Hand Gorge, Ohio, USA) 4 / James St. John</span>

サイズ変更など

Oolitic ironstone (Brassfield Formation, Lower Silurian; Ohio Brush Creek roadcut, southern Ohio, USA) 7
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/35958707693.html" target="_blank"><img src="http://farm5.static.flickr.com/4386/35958707693_ed3a0fe40a_m.jpg" alt="" /></a><br />Oolitic ironstone (Brassfield Formation, Lower Silurian; Ohio Brush Creek roadcut, southern Ohio, USA) 7 / James St. John</span>

サイズ変更など

Quartz crystal-lined vug with barite in flint meganodule (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, eastern Flint Ridge, Ohio, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/23581514260.html" target="_blank"><img src="http://farm6.static.flickr.com/5773/23581514260_72993a8616_m.jpg" alt="" /></a><br />Quartz crystal-lined vug with barite in flint meganodule (Vanport Flint, Middle Pennsylvanian; Nethers Flint Quarries, eastern Flint Ridge, Ohio, USA) 2 / James St. John</span>

サイズ変更など

Sandstone-dominated Logan Formation over shale-dominated Cuyahoga Formation (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 6
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/39102711450.html" target="_blank"><img src="http://farm5.static.flickr.com/4782/39102711450_8515804d0e_m.jpg" alt="" /></a><br />Sandstone-dominated Logan Formation over shale-dominated Cuyahoga Formation (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 6 / James St. John</span>

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Navajo Sandstone (Lower Jurassic), Paria Point, Kolob Canyons, Zion National Park, sw Utah 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8423914597.html" target="_blank"><img src="http://farm9.static.flickr.com/8079/8423914597_3875e44d79_m.jpg" alt="" /></a><br />Navajo Sandstone (Lower Jurassic), Paria Point, Kolob Canyons, Zion National Park, sw Utah 5 / James St. John</span>

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Arkose (Fountain Formation, Pennsylvanian to Permian; Colorado, USA) 2
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49139566478.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49139566478_7a509f7b5c_m.jpg" alt="" /></a><br />Arkose (Fountain Formation, Pennsylvanian to Permian; Colorado, USA) 2 / James St. John</span>

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Dickinsonia costata (Ediacaran fossil) (Ediacara Member, Rawnsley Quartzite, near-uppermost Neoproterozoic; Flinders Ranges, South Australia) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/15018192227.html" target="_blank"><img src="http://farm6.static.flickr.com/5583/15018192227_6c265a7bae_m.jpg" alt="" /></a><br />Dickinsonia costata (Ediacaran fossil) (Ediacara Member, Rawnsley Quartzite, near-uppermost Neoproterozoic; Flinders Ranges, South Australia) 1 / James St. John</span>

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Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 18
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31871421356.html" target="_blank"><img src="http://farm1.static.flickr.com/523/31871421356_539f2205a1_m.jpg" alt="" /></a><br />Nellie Blue Flint (Upper Mercer Flint, Middle Pennsylvanian; outcrop near Nellie, Coshocton County, Ohio, USA) 18 / James St. John</span>

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Sandstone-dominated Logan Formation over shale-dominated Cuyahoga Formation (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 1
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/40018785495.html" target="_blank"><img src="http://farm1.static.flickr.com/803/40018785495_7da49508b6_m.jpg" alt="" /></a><br />Sandstone-dominated Logan Formation over shale-dominated Cuyahoga Formation (Lower Mississippian; Rt. 35 roadcut, northeast of Rittenours, Ohio, USA) 1 / James St. John</span>

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Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51021656486.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51021656486_b43cac53ca_m.jpg" alt="" /></a><br />Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 4 / James St. John</span>

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Quartzose sandstone (lower Pottsville Group, Lower Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA)
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/31269449775.html" target="_blank"><img src="http://farm6.static.flickr.com/5818/31269449775_af25256aef_m.jpg" alt="" /></a><br />Quartzose sandstone (lower Pottsville Group, Lower Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) / James St. John</span>

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クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/18812828798.html" target="_blank"><img src="http://farm1.static.flickr.com/396/18812828798_bc0491ae71_m.jpg" alt="" /></a><br />Skolithos trace fossils in quartzose sandstone (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 2 / James St. John</span>

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Flint arrowhead (farmer's field near Glenford, Ohio, USA) 28
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51751182877.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51751182877_ec8cc3221d_m.jpg" alt="" /></a><br />Flint arrowhead (farmer's field near Glenford, Ohio, USA) 28 / James St. John</span>

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Sauropod dinosaur track in sandstone (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/8277689555.html" target="_blank"><img src="http://farm9.static.flickr.com/8207/8277689555_6a97ff9355_m.jpg" alt="" /></a><br />Sauropod dinosaur track in sandstone (Morrison Formation, Upper Jurassic; western side of Dinosaur Ridge, Colorado, USA) 3 / James St. John</span>

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Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 4
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/18949025136.html" target="_blank"><img src="http://farm1.static.flickr.com/448/18949025136_a8fd851440_m.jpg" alt="" /></a><br />Quartzose sandstones (Jordan Sandstone, Upper Cambrian; roadcut on the northern side of Stillwater, Minnesota, USA) 4 / James St. John</span>

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Ancestral Shoshone Indian petroglyphs (~1000 to ~200 years old) (White Mountain Petroglyphs, southwestern Wyoming, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/22865206805.html" target="_blank"><img src="http://farm1.static.flickr.com/677/22865206805_7fb4b35931_m.jpg" alt="" /></a><br />Ancestral Shoshone Indian petroglyphs (~1000 to ~200 years old) (White Mountain Petroglyphs, southwestern Wyoming, USA) 5 / James St. John</span>

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Quartz-pebble conglomerate 3
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/49536911236.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/49536911236_7822b09d84_m.jpg" alt="" /></a><br />Quartz-pebble conglomerate 3 / James St. John</span>

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Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 5
by James St. John

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/51021757522.html" target="_blank"><img src="http://farm66.static.flickr.com/65535/51021757522_4abf301836_m.jpg" alt="" /></a><br />Quartzose sandstone (Blakely Sandstone, Middle Ordovician; Coleman Quartz Mine, Arkansas, USA) 5 / James St. John</span>

サイズ変更など

クリエイティブ・コモンズ表示 2.1

<span style="font-size:10px;"><a href="http://www.igosso.net/flk/19000433535.html" target="_blank"><img src="http://farm1.static.flickr.com/269/19000433535_0816b7745f_m.jpg" alt="" /></a><br />Skolithos trace fossils in quartzose sandstone (Mazomanie Formation, Upper Cambrian; riverside cliff, western side of the St. Croix River, northeast of Lookout Point, Minnesota, USA) 9 / James St. John</span>

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