Datasets / Latest Cretaceous and Cenozoic magmatic rocks of Alaska: polygon data


Latest Cretaceous and Cenozoic magmatic rocks of Alaska: polygon data

Published By U.S. Geological Survey, Department of the Interior

Issued almost 10 years ago

US
beta

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

This map is a statewide summary of magmatic (igneous) rocks grouped into geologic units that can be portrayed cartographically at 1:2,500,000. This dataset consists of a polygon coverage and associated attribute data derived from the 1994 map "Latest Cretaceous and Cenozoic magmatic rocks of Alaska" compiled by E.J. Moll-Stalcup, D.A. Brew, and T.L. Vallier. This map was originally published ( at 1:2,5000,0000) as Plate 5 in Volume G-1, "The Geology of Alaska", edited by G. Plafker and H.C. Berg, and published by the Geological Society of America (GSA). Volume G-1 (The Geology of Alaska) is one of a series published by GSA for the Decade of North American Geology (DNAG), and is often referred to as the DNAG-Alaska volume. This digital dataset includes all 44 magmatic rock units from the original map, including dredged and outcrop sampled areas. It includes attributes for rock age (6 groups), composition (8 groupings), ranges and combinations of age and composition; and the location of hypabyssal or agglomeratic/tuffaceous units (TYPE = H or T) This coverage is not intended to be a complete representation of the printed map. It does NOT include the following features: locations of calderas or volcanoes; inset maps of magmatic provinces; or explanatory text (introduction and references).