Sample: 01KW-CP1-G3-1
| Sample ID: | 01KW-CP1-G3-1 [1] |
| Station ID: | 01KW-CP1-G3 |
| AT Num: | AT-222 |
| Volcano: | Spurr |
| Possible source: | Crater Peak |
| Eruption: | |
| Collector: | Wallace, K. L. |
| Date sampled: | |
| Sample type 1: | Tephra Fall |
| Color: | |
| Final unit: | |
| Text Description: | Stratigraphic Unit No. 3. Interpreted deposit type: tephra fall. Thickness: 62 cm cumulative (unit broken into four subunits based on bedding characteristics). Grain size: coarse lapilli to coarse ash. Bedding: alternating massive and normally graded subunits (see subunits below). Sorting: massive beds-well sorted; graded beds-poorly sorted. Juvenile clast type: black (dense, scoria-like clasts). Remarks: juvenile scoria clasts from base, correlative with AT-207. Munsell color-wet: 10YR 5.5/3 (altered); YR 2/2 (fresh). Munsell color-dry: 10YR 6/2 (altered); 10YR 2/2 (fresh). Grain shape: angular. Age: 840+/-60 yr. B.P. >1953. |
| Sample Location: |
References Cited
[1] Characterization and discrimination of Holocene tephra-fall deposits, Mount Spurr volcano, Alaska, 2003
Wallace, K. L., 2003, Characterization and discrimination of Holocene tephra-fall deposits, Mount Spurr volcano, Alaska: Northern Arizona University unpublished M.S. thesis, 169 p.
full-text pdf 256mb