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Document Type

Research

Abstract

Diatom populations in two cores of lake sediments from Northwest Iowa have been analyzed as part of an investigation into the history of postglacial sediments in this region. The three member strata sequence of sediments indicate lacustrine diatoms were deposited in the upper two members. Diatoms and macroscopic organisms are scarce to non-existent in the deepest member. Evidence indicates that the level where diatom populations were first established represents the original bottom of the lake. Pollens, particularly spruce pollen, found immediately below the upper two members were possibly blown in and mixed with sediments from the receding glacier.

Publication Date

January 1972

Journal Title

Proceedings of the Iowa Academy of Science

Volume

78

Issue

3-4

First Page

57

Last Page

62

Copyright

© Copyright 1972 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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