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Cretaceous ripples in sandstone (Vertical)
Ripplemarks in coastal-deposited sandstone of Cretaceous Dakota Formation, Colorado. Photo is about 30 cm across. (171123-49)
Download ImageCretaceous ripples in sandstone.
Ripplemarks on bedding plane in coastal-deposited sandstone of Cretaceous Dakota Formation, Colorado. Photo is about 3 meters across. (171123-45)
Download ImageCretaceous ripples in sandstone (Vertical)
Ripplemarks on bedding plane in coastal-deposited sandstone of Cretaceous Dakota Formation, Colorado. Photo is about 1.5 meters across. (171123-44)
Download ImageBlock glide along bedding plane (vertical)
Mass wasting erosion by block glide along bedding surfaces in Cretaceous Dakota Formation, Colorado (171123-43)
Download ImageBurrows in intertidal sandstone, Colorado
Burrows in intertidal sandstone of the Cretaceous Dakota Formation, Colorado. (171123-38)
Download ImageBurrows in intertidal sandstone, CO (vertical)
Burrows in intertidal sandstone of the Cretaceous Dakota Formation, Colorado. (171123-37)
Download ImageBurrows in intertidal sandstone, CO (vertical)
Burrows in intertidal sandstone of the Cretaceous Dakota Formation, Colorado. (171123-36)
Download ImageBurrows in intertidal sandstone, Colorado
Burrows in intertidal sandstone of the Cretaceous Dakota Formation, Colorado. (171123-34)
Download ImageDinosaur footprints-Cretaceous Ornithopods
Cretaceous Dinosaur Ornithopod tracks. Penny for scale. Dakota Formation, Colorado. (171123-32)
Download ImageDinosaur footprint-Cretaceous Ornithopod (vertical)
Cretaceous Dinosaur Ornithopod tracks. Penny for scale. Dakota Formation, Colorado. (171123-31)
Download ImageDinosaur footprint-Cretaceous Ornithopod (square)
Cretaceous Dinosaur Ornithopod tracks. Penny for scale. Dakota Formation, Colorado. (171123-30)
Download ImageDinosaur tracks-Cretaceous Ornithopods (Vertical)
Cretaceous Dinosaur Ornithopod tracks. Image is approximately 1.0 meters across. Dakota Formation, Colorado. (171123-28)
Download ImageDinosaur tracks-Cretaceous Ornithopods
Cretaceous Dinosaur Ornithopod tracks. Image is approximately 1.5 meters across. Dakota Formation, Colorado. (171123-26)
Download ImageDinosaur tracks-Cretaceous Ornithopods
Cretaceous Dinosaur Ornithopod tracks. Image is approximately 1.0 meters across. Dakota Formation, Colorado. (171123-22)
Download ImageDinosaur Footprints-Cretaceous mixed
Cretaceous Dinosaur Footprints-mostly Ornithopod tracks. Smaller one near center came from a Theropod. Image is approximately 1.5 meters across. Dakota Formation, Colorado. (171123-21)
Download ImageDinosaur tracks-Cretaceous Ornithopods (Vertical)
Cretaceous Dinosaur Footprints-mostly Ornithopod tracks. Image is approximately 1.5 meters across. Dakota Formation, Colorado. (171123-17)
Download ImageBedding in sedimentary rock (vertical)
Dipping bedding planes of sandstone and shale: top and cross-sectional views. Cretaceous Dakota Formation, Colorado. (171123-9)
Download ImageBedding in sedimentary rock
Dipping bedding planes of sandstone and shale: top and cross-sectional views. Cretaceous Dakota Formation, Colorado (171123-7)
Download ImageI-70 Roadcut through Dakota Fm, Colorado.
Roadcut on Interstate 70 through Cretaceous Dakota Formation, Colorado. (171123-4)
Download ImageHills of southern Kentucky
Hills of southern Kentucky at the northeastern edge of the Valley and Ridge Province of the Appalachian Mountains (171117-16)
Download ImagePennsylvanian Brethitt Fm, Kentucky (vertical)
Shallow marine and deltaic sandstone of the Pennsylvanian Brethitt Fm, Kentucky (171117-12).
Download Image
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