Radiometric Ages of Rocks in South-Central Alaska and Western Yukon Territory.

摘要

This report is a compilation of published, unpublished,and thesis material on radiometric ages from south-central Alaska and western Yukon Territory. Only data available prior to June 1979 was utilized. The locations of these samples are plotted on a National Atlas map at1:1 ,000,000(plat 1). The information is organized alphabetically by1:250,000-scale quadrangle in table 1. Data for each age obtained on a given sample is displayed on three lines. The first line consists of information concerning quadrangle, latitude and longitude to within a tenth of a minute), rock type, dating method, mineral dated, and age. The second line is reserved for additional pertinent information such as geographic location, descriptive rock names, and limitations imposed on the age by the original author. The third line consists of all known references for each sample.Table 2 is an explanation of abbreviations used in table 1.The following information is a portion of the radiometric age file covering the entire state of Alaska that resides in the U.S. Geological Survey Multics computer system.