Initiation of Branched Growth in Conoform Stromatolites as a Response to Microbial Community and Water Depth Changes in Lake Joyce, Antarctica

• Main Author: Mackey, Tyler James
• Format: Thesis
• Language: English
• Published: University of California, Davis 2012
• Subjects: Geology|Geobiology|Geochemistry; Antarctic; Lake Joyce; McMurdo Dry Valleys; The Antarctic; Antarc*; Antarctica
• Online Access: http://pqdtopen.proquest.com/#viewpdf?dispub=1519775

Branched, columnar stromatolites grew in perennially ice-covered Lake Joyce of the Antarctic McMurdo Dry Valleys during a period of lake level rise. These stromatolites are composed of the remains of filamentous, mat-forming cyanobacteria, sediment, and calcite. Calcite that precipitated within the...