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Photo ID: h0wmse	Subject: Structure	Description
	Colorado Plateau; Cross-Bedding; Cross-Stratification; Eolian Environment; Grand Canyon National Park; Lamination; Planar Bedding Structures; Sedimentary Structures	Compound cross-stratification (cross-bedding) in Esplanade Sandstone. Man at right gives scale to these complexly developed beds, which have been produced by stream or wind currents blowing sand across a surface on which sand was accumulating. Scouring of the stream floor by turbulent flowing water may create small depressions in the channel deposits, which later will be refilled by inclined beds.
	Photographer	Location
	USGS Credit Line: Courtesy United States Geological Survey	North America; United States; Arizona; Grand Canyon National Park
Photo Quality \| Large

Photo ID: h27kxk	Subject: Sedimentary Rocks	Description
	Bedding; Bedding Plane Irregularities; Biogenic Structures; Bouma; Cross Bedding; Cross-Laminations; Cross-Stratification; Crossbedding; Ichnofossils; Laminations; Planar Bedding Structures; Primary Structures; Rippled; Sand Ridges; Sand Waves; Sandstone; Sedimentary Structures; Terrigenous Materials; Trace Fossils	Crossbedded and rippled sandstone with burrows at Point Lobos, California.
	Photographer	Location
	Bruce Molnia Credit Line: Copyright © Bruce Molnia, Terra Photographics	North America; United States; California
Photo Quality \| Large	Available for Commercial Use

Photo ID: h2a5pb	Subject: General Geology	Description
	Alluvium; Cobbles; Deposition; Depositional Environment; Fluvial Environment; Gravel; Pebbles; Pleistocene; Sedimentation; Sediments; Stratification; Stratigraphy; Streams; Terrigenous Materials	A deposit of Pleistocene stream gravels. View Geological Time Scale for this image.
	Photographer	Location
	Bruce Molnia Credit Line: Copyright © Bruce Molnia, Terra Photographics	North America; United States; Indiana
Photo Quality \| Large	Available for Commercial Use

Photo ID: h2aa5h	Subject: Sedimentary Rocks	Description
	Bedding; Cliffs; Colorado Plateau; Columns; Erosion Features; Fins; Geomorphology; Permian; Petrology; Sandstone; Sedimentary Structures; Stratification; Talus; Terrigenous Materials; Weathering	Erosion shapes the sandstone into mesas, buttes, pinnacles, and gullies -- all are visible in this image. Differential erosion has produced alternating cliffs and slopes. Cliffs form on resistant sandstone and limestone formations; slopes develop in nonresistant shale. Talus slopes abound where weathering of the fins and columns has proceeded more rapidly than removal of the eroded material. View Geological Time Scale for this image.
	Photographer	Location
	USGS Credit Line: Courtesy United States Geological Survey	North America; United States; Utah; Canyonlands National Park
Photo Quality \| Large	Available for Commercial Use

Photo ID: h2eci8	Subject: Sedimentary Rocks	Description
	Bedding; Colorado Plateau; Cross Bedding; Cross Laminations; Cross Stratification; Dune Structures; Eolian Features; Jurassic; Petrology; Planar Bedding Structures; Sandstone; Sedimentary Structures; Sedimentology	Cross-bedding structures in the Navajo Sandstone of Zion National Park. The large-scale cross bedding developed in the Jurassic as successive layers of fine dune sand, blowing up gentle windward dune slopes, were deposited on steeper leeward slopes where wind velocity lessened. The Navajo Sandstone was deposited in an ancient desert about the size of today's Sahara. View Geological Time Scale for this image.
	Photographer	Location
	Bruce Molnia Credit Line: Copyright © Bruce Molnia, Terra Photographics	North America; United States; Utah
Photo Quality \| Large	Available for Commercial Use

Photo ID: h31zcz	Subject: Sedimentary Rocks	Description
	Bedding; Permian; Petrology; Sandstone; Sedimentary Structures; Stratification; Terrigenous Materials	Horizontal bedding in Cedar Mesa sandstone. Canyonlands National Park in Utah. View Geological Time Scale for this image.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Utah; Canyonlands National Park
Photo Quality \| Large	Available for Commercial Use

Photo ID: h3203c	Subject: Structure	Description
	Cross-bedding; Cross-laminations; Cross-stratification; Laminations; Planar Bedding Structures; Precambrian; Sedimentary Structures	Cross-bedded sandstone of the Stirling formation. Precambrian in age. View Geological Time Scale for this image.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; California
Photo Quality \| Large	Available for Commercial Use

Photo ID: h320b8	Subject: Sedimentary Rocks	Description
	Bedding; Erosional Features; Geomorphology; Permian; Petrology; Pothole; Sedimentary Layers; Stratification	Pothole and reflection in Permian Cedar Mesa Sandstone. View Geological Time Scale for this image.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States; Utah; Canyonlands National Park
Photo Quality \| Large	Available for Commercial Use

Photo ID: h320pu	Subject: Sedimentary Rocks	Description
	Bedding; Clastic Rocks; Foliation; Laminations; Mudstone; Petrology; Planar Bedding Structures; Sedimentary Structures; Stratification; Terrigenous Materials	Plane laminations in siltstones.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America
Photo Quality \| Large	Available for Commercial Use

Photo ID: h320rp	Subject: Sedimentary Rocks	Description
	Bedding; Carboniferous; Ozark Shelf; Pennsylvanian; Petrology; Planar Bedding Plane Structures; Ripple Marks; Shale; Stratification; Terrigenous Materials	Climbing ripples in the Pennsylvanian Atoka formation. View Geological Time Scale for this image.
	Photographer	Location
	Marli Miller Credit Line: Copyright © Marli Miller, University of Oregon	North America; United States
Photo Quality \| Large	Available for Commercial Use

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