Re-evaluation of Precambrian "fucoids," microbially induced sedimentary structures in the Proterozoic Dox Formation, Grand Canyon National Park, Arizona
Tweet JS and Lucas SG. 2020. Re-evaluation of Precambrian "fucoids," microbially induced sedimentary structures in the Proterozoic Dox Formation, Grand Canyon National Park, Arizona. Pages 427-435. In Fossil Record 7. New Mexico Museum of Natural History and Science. Albuquerque, New Mexico. New Mexico Museum of Natural History and Science Bulletin. Bulletin 82
Two rock surfaces (part and counterpart) in the Mesoproterozoic Dox Formation, collected and reported by Edwin D. McKee in the early 1930s, preserve a polygonal pattern of spindle-shaped, sediment-filled fractures. They are remarkably similar to microbially-mediated shrinkage cracks filled with petees sensu lato documented from other Proterozoic and some geologically younger stratigraphic units worldwide. McKee’s specimens are likely to be microbially induced sedimentary structures (MISS) and, together with records of stromatolites from the Dox Formation, indicate that this stratigraphic unit is likely to contain a significant record of MISS that merits further exploration and study.
- Type
- Book Chapter
- Authors
- Tweet, Justin; Lucas, Spencer
- Units
- GRCA
- Subjects
- Ecological Framework: Geology and Soils | Paleontology | Paleontology