ammonites
banner
Gateway to the Paleobiology Database
Rietoog, Driedoornvlagte pinnacle reef complex (Ediacaran of Namibia)

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 - 542.0 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

• The reef complex is over 300 m thick and at least 7 km long. Bioherms individually form elliptical mounds that reach up to 20 m in diameter, 5 to 10 m

•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)