Description
40Ar/39Ar analyses of igneous rocks from the Alaska Highway corridor between Delta Junction and the Canada border show a range of Cretaceous ages from about 68 Ma to about 112 Ma. The 25 samples fall into two broad age groups. The younger group ranges from about 68 Ma to 73 Ma; the older group ranges from a minimum age of about 84 Ma to about 103 Ma. One sample, a mafic dike, yielded an older age of about 112 Ma.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| Web Resource | Unknown | Open resource | |
| ASCII tabular files | Unknown | CSDGM IMPORT ERROR: No digtinfo/formcont | Open resource |
Tags
- 40ar/39ar
- age dates
- alaska highway corridor
- analyses and sampling
- analytical lab results
- analytical results
- ar-ar
- bedrock
- bedrock geology
- cretaceous
- geochronology
- geology
- lab methods
- mount hayes quadrangle
- nabesna quadrangle
- sample location
- tanacross quadrangle
- yukon-tanana terrane
- yukon-tanana upland