subduction

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 41
by James St. John

Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 1
by James St. John

Three big earthquakes (Indonesia & Philippines & New Guinea) (10 April 2021) 2
by James St. John

Death Valley National Park
by RuggyBearLA

Mount Scott Volcano (Crater Lake National Park, Oregon, USA) 14
by James St. John

Anthracite coal 2
by James St. John

Quenched blobs in pinkish-reddish porphyritic dacite (Upper Pleistocene, 27 ka; Devastated Area, Lassen Volcano National Park, California, USA) 9
by James St. John

Lassen Volcano (~29 ka dacitic volcanic dome) (Lassen Volcanic National Park, California, USA) 15
by James St. John

Offshore Tonga Islands magnitude 7.6 earthquake (5:02 AM, 11 May 2023) 2
by James St. John

Mount Thielson, As Seen from North Rim of Crater Lake National Park, Oregon
by Ken Lund

Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 29
by James St. John

Volcanic ash (April 2009 eruption of Mt. Redoubt, Aleutian Volcanic Arc, Alaska, USA)
by James St. John

Phyllites (Anakeesta Formation, Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 5
by James St. John

Death Valley National Park - Coyote Canyon
by RuggyBearLA

Death Valley National Park - Coyote Canyon
by RuggyBearLA

Landslide scar (Anakeesta Ridge, Great Smoky Mountains, Tennessee, USA) 1
by James St. John

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 21
by James St. John

Kyanitic eclogite (Late Cretaceous, 90-95 Ma; near Fost, Slovenska Bistrica Municipality, Slovenia) 4
by James St. John

Northwestern Peru magnitude 6.2 earthquake (12:10 PM, 30 July 2021)
by James St. John

Pacific-Antarctic Ridge magnitude 6.0 earthquake (8:17 AM, 11 January 2023)
by James St. John

Java Trench area magnitude 6.6 earthquake (4:05 PM, 14 January 2022) 4
by James St. John

Death Valley National Park - Titus Canyon
by RuggyBearLA

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 11
by James St. John

Pyritic dacitic lapilli metatuff (pyritic dacitic meta-lapillistone) (Neoarchean, ~2.7-2.72 Ga; vicinity of Soudan Mine, Soudan, Minnesota, USA)
by James St. John

Izu-Bonin Trench area magnitude 6.3 earthquake (1:49 PM, 16 January 2023)
by James St. John

Brokeoff Caldera (near Mt. Lassen, California, USA) 3
by James St. John

Cluster of 114 Yellowstone earthquakes (10-11 September 2020)
by James St. John

South Scotia Ridge magnitude 6.3 earthquake (10:53 PM, 25 July 2020)
by James St. John

Black Rock (Pleistocene olivine orendite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 62
by James St. John

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 32
by James St. John

Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 6
by James St. John

Molybdenum ore (Climax Stock, Oligocene, 24-33 Ma; Climax Mine, Fremont Pass, Colorado, USA) 1
by James St. John

Travertine (spring on eastern side of the San Pitch Mountains, Utah, USA) 3
by James St. John

Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 27
by James St. John

Mount Hood Volcano (Cascade Range, Oregon, USA) 1
by James St. John

Phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap, Great Smoky Mountains, North Carolina, USA) 5
by James St. John

Travertine (spring on eastern side of the San Pitch Mountains, Utah, USA) 4
by James St. John

27 earthquakes in the South Sandwich Trench area (12 August 2021)
by James St. John

Pilot Butte (Pliocene madupite lamproite volcanic center in the Leucite Hills, Wyoming, USA) 4
by James St. John

Volcanic debris flow deposit (upper Holocene, May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 20
by James St. John

Hornblende andesite (Mount Shasta, California, USA) 2
by James St. John

Guatemala magnitude 6.4 earthquake (5:02 PM, 17 May 2023) 2
by James St. John

Death Valley National Park - Titus Canyon
by RuggyBearLA

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 20
by James St. John

Thunderhead Sandstone (Neoproterozoic; Clingmans Dome, Great Smoky Mountains, North Carolina, USA) 3
by James St. John

Phyllite (Anakeesta Formation, Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 1
by James St. John

Metachert (Arkansas Novaculite, Devonian-Mississippian; ZigZag Mountains, Arkansas, USA) 43
by James St. John

Kermadec Trench area magnitude 7.1 earthquake (12:41 PM, 24 April 2023) 2
by James St. John

Northern Peru magnitude 7.5 earthquake (5:52 AM, 28 November 2021) 7
by James St. John

Re-exhumed sub-fossil tree (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 26
by James St. John

Chaos Crags volcanic domes & Chaos Jumbles Landslide (Holocene; Lassen Volcano National Park, California, USA) 8
by James St. John

Mount Thielsen Volcano (Cascade Range, Oregon, USA) 2
by James St. John

Kamanjab Inlier, Namibia magnitude 5.4 earthquake (3:41 AM, 4 April 2021)
by James St. John

Chaos Jumbles Landslide (upper Holocene; Lassen Volcano National Park, California, USA) 7
by James St. John

Reflection Pond, Lassen Volcanic National Park, California
by Ken Lund

Re-exhumed sub-fossil trees (died late 1700s) (Sandy River, Oxbow Park, Oregon, USA) 38
by James St. John

Offshore Sumatra magnitude 6.7 earthquake (4:09 AM, 14 March 2022) 2
by James St. John

24Seven: E-DECIDER 14:40 EDT
by NASA Earth RIght Now

Soapstone (quarry near Francestown, New Hampshire, USA) 1
by James St. John

Black porphyritic dacite (upper Holocene, 14 May 1915; Devastated Area, Lassen Volcano National Park, California, USA) 45
by James St. John