Quaternary Coasts of the United States: Marine and Lacustrine Systems
Quaternary Coasts of the United States: Marine and Lacustrine Systems Project #274 Quaternary Coastal Evolution - This Special Publication represents the major cumulative contribution of the Working Group of the United States of America to IGCP Project 274. The primary aims of Project 274 are to: (1) document and explain local to global variations in coastal and continental-shelf evolution, incorporating knowledge of coastal and shelf processes and environment with geodynamic, climatic, oceanographic and other data to produce local and regional models, ranging from descriptive to numerical, leading to a better understanding of interactive forces responsible for past, present and future changes to the coasts of the world; and (2) promote specified thematic studies, which are necessary to solve problems of coastal change affecting human occupation of the coastal zone. The volume contains sections on Atlantic, Pacific, Gulf and Lacustrine shorelines, covering both Holocene and Pleistocene deposits, representing a summary of decades of research into coastal and continental-shelf evolution of North America.
Aminostratigraphy of Southern California Quaternary Marine Terraces
-
Published:January 01, 1992
Abstract
Amino-acid enantiomeric ratios, or D/L values, in molluscs from central and southern California Quaternary coastal units are compared and summarized using a combination of stratigraphic control, kinetic modeling, and current temperature differences along the coast. Methods for comparison of analytical data obtained by both gas-chromatographic and liquid-chromatographic methods are used to normalize results obtained over nearly 15 years into a common format. Most of the results imply ages that fall within stage 5 of the marine oxygen isotope record. Distinct aminozones representing at least three pre-stage 5 depositional episodes are also recognized. Discrepancies between amino-acid age estimates and those derived from independent evidence are quantified using kinetic modeling, and an anomalous local thermal history is invoked to explain one particular conflict between aminostratigraphic and mor-phostratigraphic interpretations.