supergroup

Grallator gracilis (dinosaur footprint) (Portland Arkose, Lower Jurassic; Rocky Hill, Connecticut, USA)
by James St. John

M.E.N.U.D.O
by T.Young

Grallator (dinosaur footprints) (Cow Branch Formation, Upper Triassic; Solite Quarry, Pittsylvania County-Rockingham County border, Virginia-North Carolina border, USA) 10
by James St. John

Quartz tholeiite basalt lava flows (flow B over flow A, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
by James St. John

Quartz tholeiite basalt lava flow (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 7
by James St. John

Metcalf Phyllite (Neoproterozoic; Laurel Creek Road outcrop, Great Smoky Mountains, Tennessee, USA) 10
by James St. John

Mudcracks in argillite (Grinnell Formation, Mesoproterozoic, ~1.45 Ga; Glacier National Park, Montana, USA) 3
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 3
by James St. John

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 5
by James St. John

Sandstone (Upper Triassic; Jordan Lake, North Carolina, USA) 23
by James St. John

Lakeshore beach gravel (upper Holocene; derived from the North Shore Volcanic Series, Mesoproterozoic, 1.1 Ga; Burlington Bay, Two Harbors, Minnesota, USA) 4
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Grypania spiralis (Negaunee Iron-Formation, Paleoproterozoic, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 46
by James St. John

Anakeesta Formation (Neoproterozoic; Morton Overlook roadcut, Great Smoky Mountains, Tennessee, USA)
by James St. John

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 6
by James St. John

Metatillite (Diamictite) (Gowganda Formation, 2.3 Ga; Salt Creek gravel bar, Haynes, Ohio, USA) 2
by James St. John

Arkose (Newark Supergroup, Triassic-Jurassic; Mt. Tom, Massachusetts, USA) 6
by James St. John

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, St. Croix Falls, Wisconsin, USA) 7
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 20
by James St. John

Grypania spiralis (Greyson Shale, Mesoproterozoic, 1454-1468 Ma; western flanks of the Big Belt Mountains, Montana, USA) 3
by James St. John

Slaty metadolostone (Kona Dolomite, Paleoproterozoic, 2.2 to 2.3 Ga; Marquette South Outcrop, Upper Peninsula of Michigan, USA)
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 10
by James St. John

Jordan Lake (Chatham County, North Carolina, USA) 4
by James St. John

Metatillite (diamictite) (Gowganda Formation, Paleoproterozoic, ~2.3 Ga; Route 6 outcrop, north of Manitoulin Island, Ontario, Canada) 2
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 12
by James St. John

Banded iron formation (Negaunee Iron-Formation, Paleoproterozoic, 1.874 or 2.11 Ga; Cliffs Shaft Mine, Ishpeming, Michigan, USA) 2
by James St. John

Grypania spiralis (Negaunee Iron-Formation, 2.11 Ga or 1.874 Ga; Empire Mine, SE of town of Ishpeming, Marquette County, Upper Peninsula of Michigan, USA) 37
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 18
by James St. John

Grallator (dinosaur footprint) (Cow Branch Formation, Upper Triassic; Solite Quarry, Pittsylvania County-Rockingham County border, Virginia-North Carolina border, USA) 20
by James St. John

Spirits in the Sky (Mark Tulin) at Muddy Waters, Santa Barbara, 8-27-2009
by Carl Pocket

Metcalf Phyllite (Neoproterozoic; Laurel Creek Road outcrop, Great Smoky Mountains, Tennessee, USA) 13
by James St. John

Concretions in sandstone (Thunderhead Sandstone, Neoproterozoic; Clingmans Dome, Great Smoky Mountains, North Carolina, USA) 1
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 14
by James St. John

Basalt lava flow (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 4
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Angular unconformity - horizontal Tonto Group (Cambrian) over tilted Grand Canyon Supergroup (1.1-1.2 Ga), Grand Canyon, Arizona 2
by James St. John

Phyllites (Anakeesta Formation, Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 12
by James St. John

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 2
by James St. John

Fault slickenside (Great Smoky Mountains, Tennessee-North Carolina, USA) 3
by James St. John

Intergranular calcite in autobrecciated amygdaloidal tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 3
by James St. John

Basalt lava flows (North Shore Volcanic Group, Mesoproterozoic, ~1.1 Ga; Lake Superior shoreline exposure along the North Shore Scenic Railroad line, just northeast of Duluth, Minnesota, USA) 2
by James St. John

Large quartz-laumontite amygdule in quartz tholeiite basalt lava flow (Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 8
by James St. John

Metcalf Phyllite (Neoproterozoic; Laurel Creek Road outcrop, Great Smoky Mountains, Tennessee, USA) 5
by James St. John

Thunderhead Sandstone (Neoproterozoic; Clingmans Dome, Great Smoky Mountains, North Carolina, USA) 4
by James St. John

Rhyolite (Palisade Rhyolite, North Shore Volcanic Group, Mesoproterozoic, 1096-1097 Ma; Rt. 1 roadcut just north of Ilgen City, Minnesota, USA) 12
by James St. John

Tholeiitic basalts (Clam Falls Volcanics, Mesoproterozoic, ~1.1 Ga; Interstate State Park, Taylors Falls, Minnesota, USA) 1
by James St. John

Sandstone (Upper Triassic; Jordan Lake, North Carolina, USA) 18
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Roaring Fork Sandstone (Neoproterozoic; Newfound Gap Road roadcut, Great Smoky Mountains, Tennessee, USA) 2
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 29
by James St. John

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 35
by James St. John

Jasper-quartz pebble conglomerate (Lorrain Formation, Paleoproterozoic, ~2.3 Ga; Ottertail Lake Northeast roadcut, near Bruce Mines, Ontario, Canada) 38
by James St. John

Little River & boulders of Thunderhead Sandstone (Neoproterozoic; Great Smoky Mountains, Tennessee, USA) 1
by James St. John

Sugilite-braunite (Hotazel Formation, Paleoproterozoic, 2.2-2.3 Ga; Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa) 3
by James St. John

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Bright Eyes Performs at The Boulevard Pool at The Cosmopolitan of Las Vegas on September 24, 2011
by The Cosmopolitan of Las Vegas

Autobrecciated amygdaloidal quartz tholeiite basalt aa lava flow top (flow B, Two Harbors Basalts, North Shore Volcanic Series, Mesoproterozoic, 1097-1098 Ma; Burlington Bay, Two Harbors, Minnesota, USA) 27
by James St. John