USGS: Science Topics: Paleozoic

Science Topics

Paleozoic

Subtopics:
Cambrian (1 items)
Devonian (2 items)
Mississippian (1 items)
Ordovician (1 items)
Pennsylvanian (1 items)
Permian (1 items)
Silurian (1 items)

Results 1 - 3 of 3 listed by similarity [list alphabetically]

Assessment of undiscovered oil and gas resources of the Devonian Marcellus Shale of the Appalachian Basin Province [More info]: We estimated a mean undiscovered natural gas resource of 84,198 billion cubic feet and a mean undiscovered natural gas liquids resource of 3,379 million barrels using a geology-based assessment methodology.
Divisions of geologic time-major chronostratigraphic and geochronologic units [More info]: Revised geologic time scale indicating the ages of the lower bounds of chronostratigraphic and geochronologic units as they are currently known. Modifications to those ages made since the previous time scale was released (2007) are clearly marked.
Geology of the Chesapeake and Ohio Canal National Historical Park and Potomac River Corridor, District of Columbia, Maryland, West Virginia, and Virginia [More info]: Rocks representing a variety of tectonic and depositional environments outcrop along the canal and towpath and reveal the geologic history of the central Appalachian region from the Mesoproterozoic to Jurassic Period.

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