DEPTH PATTERNS OF BENTHONIC FORAMINIFERA IN THE EASTERN PACIFIC
Abstract
Depth zonations of benthonic Foraminifera off the western United States are summarized. Generalized depth biofacies in 55 new samples from coastal Mexico are at 25 m, 35 m, 55 m, 75-85 m, 120 m, 180 m, 340 m and 550 m. Criteria for determining depth biofacies are examined. Distributions based on living specimens are the most reliable. Shallow limits of species are the best boundary indicators; deep limits of species vary in value as indicators due to possible movement of specimens downslope. Each species seems to have a distinctive depth range and there are almost as many depth boundaries as there are species. Analysis of species depth ranges in new samples from coastal Mexico shows at least 24 depth boundaries. Analysis of data from the San Diego, California, area suggests 72 boundaries which can be recognized on the basis of shallow and deep limits of species.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 07, 1965
- Accession Number
- AD0622264
Entities
People
- Fred B. Phleger
Organizations
- Scripps Institution of Oceanography