Sample: ACT-670
| Sample ID: | ACT-670 [1] |
| Station ID: | Lignite _Creek |
| AT Num: | |
| Volcano: | |
| Possible source: | |
| Eruption: | |
| Collector: | Beget, J. E. |
| Date sampled: | |
| Sample type 1: | Tephra Fall |
| Color: | tan to white |
| Final unit: | |
| Text Description: | Tan to white layer as much as 10-20 cm thick, exposed in the center of silt block. Finely grained volcanic glass shards with a modal diameter of 20-40 microns. The tephra bed is strongly folded into a pattern that mirrors the shape of the margin of the silt block, indicating that the silt block and surrounding gravels were both subject to a similar history of compression and faulting. A 2-4 cm thick, black, organic-rich layer associated with the tephra is also tightly folded and apparently constitutes a paleosol that originally underlay the tephra. |
| Sample Location: |