Opal Sinters Shapefile.zip
URL: https://gdr.openei.org/files/938/Utah_PFA_OpalSinters.zip
The points in this shapefile show locations of silica sinters and hydrothermally altered (opalized/silicified) mio-pliocene fresh water limestone in the Twin Peaks and Cove Creek Dome areas in southwestern Utah. These were sample sites. The samples underwent x-ray diffraction analysis to determine mineralogy to determine the percent and type of opal present. This was for relative dating. Studies have shown that it takes approximately 40,000 years for hot spring related opal to transition to quartz, with transitions from opal-A, opal-CT, opal-C in between. The high concentration of opal CT in most of these samples may indicate that their age is similar to Opal Mound fault opal at Roosevelt Hot Spring (
Additional Information
| Field | Value |
|---|---|
| Data last updated | August 8, 2022 |
| Metadata last updated | November 22, 2025 |
| Created | August 8, 2022 |
| Format | ZIP |
| License | Creative Commons Attribution |
| Datastore active | False |
| Has views | True |
| Id | b0cd7870-952f-4324-9041-107f28520869 |
| Mimetype | application/zip |
| Package id | 68a75d9e-9e89-4e0b-9e82-b75b5a7eac17 |
| Position | 2 |
| State | active |