Also known as Reef 4124
Where: Namibia (23.9° S, 16.7° E: paleocoordinates 41.4° S, 179.2° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Omkyk Member (Zaris Formation), Ediacaran (635.0 - 541.0 Ma)
• An ash bed that immediately overlies the Omkyk Member has been dated as 548.8 +/- 1 My B.P.
• group of beds-level stratigraphic resolution
Environment/lithology: reef, buildup or bioherm; lithified limestone
•in width, and 5 m in height. Bioherm cores were constructed by massive thrombolites, often with entrapped Namacalathus; the outer layers consist of stromatolites up to 0.75 m thick. Fissures are abundant and occur with a spacing of up to three per meter. Remaining void space is filled with large neomorphosed aragonitic botryoids up to 15 mm in radius.
Size class: macrofossils
Primary reference: R. A. Wood, J. P. Grotzinger, and J. A. D. Dickson. 2002. Proterozoic Modular Biomineralized Metazoan from the Nama Group, Namibia. Science 296(5577):2383-2386 [W. Kiessling/U. Merkel]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 113370: authorized by Wolfgang Kiessling, entered by Uta Merkel on 28.07.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
| unclassified | |
Namapoikia rietoogensis n. gen. n. sp.
Namapoikia rietoogensis n. gen. n. sp. Wood et al. 2002 | |
| Cloudina | |
|
Cloudina sp. Germs 1972 | |
| Namacalathus | |
|
Namacalathus sp. Grotzinger et al. 2000 | |