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Interactive maps > Data download > K/Ar ages from the National Geochronological Database

United States
country in North America

13,720 records lie within United States
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Wider areas North America < Land

Geographic subdivisions and overlapping areas
StatesQuadranglesHydrologic units
(2-digit regions)
Map showing United States divided by fips units Washington Washington Washington Montana Maine Maine North Dakota South Dakota Wyoming Wisconsin Wisconsin Idaho Vermont Minnesota Oregon New Hampshire Iowa Massachusetts Massachusetts Massachusetts Nebraska New York New York New York New York Pennsylvania Connecticut Rhode Island Rhode Island Rhode Island New Jersey Indiana Nevada Utah California California California California California Ohio Illinois District of Columbia Delaware West Virginia Maryland Maryland Maryland Maryland Colorado Kentucky Kentucky Kansas Virginia Virginia Virginia Missouri Arizona Oklahoma North Carolina North Carolina North Carolina North Carolina North Carolina North Carolina Tennessee Texas Texas Texas Texas Texas Texas New Mexico Alabama Mississippi Georgia Georgia South Carolina South Carolina Arkansas Louisiana Louisiana Louisiana Louisiana Florida Florida Florida Florida Florida Florida Florida Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Alaska Michigan Michigan Michigan Michigan Michigan Hawaii
Geographic subdivisions (numbers indicate data points in each subdivision):
24Alabama
530Alaska
951Arizona
9Arkansas
2,430California
378Colorado
181Connecticut
0Delaware
0District of Columbia
20Florida
209Georgia
0Hawaii
718Idaho
13Illinois
0Indiana
8Iowa
16Kansas
3Kentucky
0Louisiana
142Maine
10Maryland
125Massachusetts
64Michigan
205Minnesota
7Mississippi
19Missouri
833Montana
21Nebraska
2,189Nevada
96New Hampshire
22New Jersey
619New Mexico
113New York
197North Carolina
8North Dakota
9Ohio
35Oklahoma
1,157Oregon
30Pennsylvania
40Rhode Island
52South Carolina
27South Dakota
79Tennessee
157Texas
625Utah
72Vermont
15Virginia
852Washington
1West Virginia
32Wisconsin
353Wyoming


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Page Last modified: 16:29 on 09-May-2008