This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and shar

Source URL: tectonics.caltech.edu

• Archaeological sub-disciplines
• Palynology
• Ordovician
• Chitinozoan
• Biostratigraphy
• Hirnantian
• Acritarch
• Micropaleontology
• Paleontology
• Fossils
• Biology