Skip to main content
  1. ScienceBase Catalog
  2. USGS Data Release Products
  3. Strontium isotope, amino acid, and fossil taxonomy data to aid in identifying instances of marine terrace reoccupation on Anacapa and San Miguel Islands, California, USA

Strontium isotope, amino acid, and fossil taxonomy data to aid in identifying instances of marine terrace reoccupation on Anacapa and San Miguel Islands, California, USA

Dates

Publication Date
Time Period
2024

Citation

Muhs, D.R., Groves, L.T., Simmons, K.R., Schumann, R.R., and DeVogel, S.B., 2024, Strontium isotope, amino acid, and fossil taxonomy data to aid in identifying instances of marine terrace reoccupation on Anacapa and San Miguel Islands, California, USA: U.S. Geological Survey data release, https://doi.org/10.5066/P97FVKB7.

Summary

In areas of low uplift rate on the Pacific Coast of North America, reoccupation of emergent marine terraces by later high-sea stands has been hypothesized to explain the existence of thermally anomalous faunas (mixtures of warm and cool species) of last interglacial age. If uplift rates have been low for much of the Quaternary, it follows that higher (older) terraces should also show evidence of reoccupation. Strontium isotope analyses of fossils from a high-elevation marine terrace on Anacapa Island, California yield a suite of ages ranging from ~2.4-2.3 Ma to ~1.4-1.5 Ma. These results indicate that terrace reoccupation and fossil mixing on Anacapa Island could have taken place over several interglacial periods in the early Pleistocene. [...]

Contacts

Point of Contact :
Daniel R Muhs
Originator :
Daniel R Muhs, Lindsey T. Groves, Kathleen R Simmons, R. Randall Schumann, Stephen B. DeVogel
Metadata Contact :
R. Randall Schumann
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Geosciences and Environmental Change Science Center
USGS Mission Area :
Ecosystems

Attached Files

Click on title to download individual files attached to this item.

Metadata_Two_Islands.xml
Original FGDC Metadata
View 		29.01 KB application/fgdc+xml
Data Dictionary Two Islands.csv 7.11 KB text/csv
Supplementary Data Table 1 Amino acid ratios in fossil Tegula.csv 15.13 KB text/csv
Supplementary Data Table 1 Amino acid ratios in fossil Tegula.xlsx 19.54 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Table 1 Composition of Epilucina and Leukoma shells.csv 2.91 KB text/csv
Table 1 Composition of Epilucina and Leukoma shells.xlsx 11.76 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Table 2 Compositions of fossil shells from Anacapa and San Miguel islands.csv 8.5 KB text/csv
Table 2 Compositions of fossil shells from Anacapa and San Miguel islands.xlsx 14.78 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Table 3 Sr isotope ages of Anacapa and San Miguel mollusks.csv 10.7 KB text/csv
Table 3 Sr isotope ages of Anacapa and San Miguel mollusks.xlsx 19.48 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Table 4 Middle Anacapa Island new fossil locality faunas.csv 2.41 KB text/csv
Table 4 Middle Anacapa Island, new fossil locality faunas.xlsx 11.19 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Table 5 San Miguel Island, new fossil locality faunas.csv 4.15 KB text/csv
Table 5 San Miguel Island, new fossil locality faunas.xlsx 15.06 KB application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
Metadata_Two_Islands.met 27.84 KB text/plain

Purpose

The geochemical and geochronological data in this data release support age determinations of fossil mollusks that, in turn, indicate ages of marine terraces on Middle Anacapa Island and San Miguel Island.

Map

Map Preview

Communities

  • USGS Data Release Products

Tags

Provenance

Additional Information

Identifiers

Type Scheme Key
DOI https://www.sciencebase.gov/vocab/category/item/identifier doi:10.5066/P97FVKB7

Item Actions

View Item as ...

JSON ATOM ISO XML

Save Item as ...

JSON FGDC MODS XML ISO XML

View Item...

Metrics