North American Tectonic reconstructions are from the website of Dr. Ron Blakey at N.Arizona University These are by far the best reconstructions I have found http://cpgeosystems.com Colorado Plateau Geosystems I have outlined Texas for the purposes of our Geology Talk, Enjoy! -Carter Keairns 512-757-0735 carteroil@yahoo.com

~575 mya Late PreCambrian

~575 mya Late PreCambrian

~510 mya Mid-Cambrian

~500 mya Late Cambrian

~485 mya Early Ordovician

~470 mya Mid Ordovician

~450 mya Late Ordovician

~430 mya Early Silurian

~420 mya Late Silurian

~400 mya Early Devonian

~385 mya Mid Devonian

~360 mya Late Devonian

~345 mya Mid Mississippian

~325 mya Late Mississippian

~315 mya Early Pennsylvanian

~300 mya Late Pennsylvanian

~290 mya Early Permian

~275 mya Mid Pennsylvanian

~260 mya late Permian

~245 early Triasssic

~230 mya Mid Triassic

~210 late Triassic

~195 mya early Jurassic

~180 mya early Jurassic

~170 mya mid Jurassic

~150 mya late Jurassic

~140 mya early Cretaceous

~130 mya early Cretaceous

~115 mya early Cretaceous

~100 mya Late Cretaceous

~85 mya Late Cretaceous

~75 mya Late Cretaceous

~65 mya K-T Boundary

~60 mya Paleocene

~50 mya Eocene

~40 mya Eocene

~25 mya Oligocene

~15 mya Miocene

~8 mya Miocene

~3 mya Pliocene

~0.12 mya Quaternary Glacial

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