An uplifted wave-cut marine platform eroded across bedrock of the Franciscan Complex at Point Delgada, northern California, is overlain by 0.5 to 5 m of wave-worked pea gravel, which is in turn directly overlain by fluvial gravel and silt deposited as alluvial fans. Fossil wood debris from this horizon yields a 14C date of 44 800 yr. We tentatively correlate this terrace with the middle Wisconsin high sea-level stand at -37m, and if so, the tectonic uplift since middle Wisconsin time has been 44m, and the average rate of uplift has been at least 1.0m/1000 yr. -from Author
Citation Information
| Publication Year | 1983 |
|---|---|
| Title | Tectonic uplift of a middle Wisconsin marine platform near the Mendocino triple junction California. |
| Authors | R. J. McLaughlin, K. R. Lajoie, D. H. Sorg, S.D. Morrison, J. A. Wolfe |
| Publication Type | Article |
| Publication Subtype | Journal Article |
| Series Title | Geology |
| Index ID | 70011381 |
| Record Source | USGS Publications Warehouse |