Geologic Map of Alaska: geologic units
收藏DataONE2016-10-29 更新2024-06-26 收录
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资源简介：
This dataset consists of a polygon coverage and associated
attribute data derived from the 1980 Geologic Map of Alaska
compiled by H.M. Beikman and published by the U.S. Geological
Survey. The map is a regional summary of geologic formations and
units that can be shown cartographically at 1:2,500,000. This
digital dataset includes all 184 map units from the original
map. 182 are geologic units; the others are polygons for large
glaciers and lakes. This coverage is not intended to be a
complete representation of the printed geologic map. It does NOT
include faults, locations of volcanoes or volcanic vents, the map
explanation, correlation charts or description of map units.
创建时间：
2016-10-29
