Uranium series ages of corals from the upper Pleistocene Mulege terrace, Baja California Sur, Mexico
Specimens of Porites californica contained in the sediments of upper Pleistocene, +12-m marine terrace deposits developed on the east coast of the Baja California (Mexico) peninsula at Mulege have yielded /sup 239/Th//sup 234/U dates of 124 +/- 5 and 144 +/- 7 ka (+/- 1 sigma). These dates can be assigned to the well-documented late Pleistocene oxygen-isotope stage 5e high sea stand. Differences between the eustatic and present elevations of this terrace indicate average uplift rates since terrace formation of approximately 4 to 5 cm/1000 yr, indicating a relative stability and lack of major vertical deformation since the late Pleistocene. This terrace in the Mulege area can now be correlated with other marine terraces throughout the Baja California peninsula and southern California.
- Research Organization:
- San Diego State Univ., CA (USA)
- OSTI ID:
- 5237474
- Journal Information:
- Geology; (United States), Journal Name: Geology; (United States) Vol. 15:2; ISSN GLGYB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sr-isotopic variation in the Quaternary: The record from glacial and interglacial marine terraces
U-series ages of solitary corals from the California coast by mass spectrometry
Related Subjects
580100* -- Geology & Hydrology-- (-1989)
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
AGE ESTIMATION
ALPHA DECAY RADIOISOTOPES
CENOZOIC ERA
CNIDARIA
CORALS
CORRELATIONS
DEFORMATION
DEVELOPING COUNTRIES
EVEN-EVEN NUCLEI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC HISTORY
HEAVY NUCLEI
ISOTOPE DATING
ISOTOPES
LATIN AMERICA
MEXICO
NORTH AMERICA
NUCLEI
PLEISTOCENE EPOCH
QUATERNARY PERIOD
RADIOISOTOPES
STRATA MOVEMENT
THORIUM 230
THORIUM ISOTOPES
URANIUM 234
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES