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Natural Science Forum / Earth Science / Mineralogy / August 2004Search for Oolithes
One of the main topics of my hobby is to collect special oolithes, named roestone (Rogenstein). In the mid of North Germany these carbonate based oolithes reach diameters between 2 and 16 mm. They were generated on a flat bank area in the time of the Lower Buntsandstein (Brahmanian). My question is now : are there any other locations in the world, where oolithes with similiar age and similiar big diameters can be found ? Wolfgang alias Dr. Rogenstein Is this the same as pisolites? If so, see the Permian-aged carbonates associated with the Capitain reef in West Texas and southeast New Mexico in the USA. In particular an article by: Esteban, M., and Pray, L. C., 1977, Origin of the pisolite facies of the shelf crest; in: "Upper Guadalupian Facies, Permian Reef Complex, Guadalupe Mountains, New Mexico and West Texas", pp. 479-487, eds. Hileman, Mary, and Mazzullo, S. J. Permian Basin Section, Society of Paleontologist and Mineralogists (SEPM) Publication 77-16, Midland, TX, USA. There is also a companion guidebook with spectacular photo of this facies. DHE > One of the main topics of my hobby is to collect special oolithes, > named roestone (Rogenstein). In the mid of North Germany these [quoted text clipped - 7 lines] > alias > Dr. Rogenstein Many thanks for this literature hint, DHE ! Sometimes the bigger ones of the regular shaped oolithes are named "pisolithes" (pea-stones), but there are several authors that title the irregular onkoides with the terminus pisolith. OK, I'll check your literature hint and see, what is meant. Do you have a sample from the Captain reef ? Wolfgang > Is this the same as pisolites? If so, see the Permian-aged carbonates > associated with the Capitain reef in West Texas and southeast New Mexico in [quoted text clipped - 20 lines] > > alias > > Dr. Rogenstein Oh no, DHE, the Captain reef is an onkoid ore. I found something in http://www.geoinfo.nmt.edu/staff/scholle/permstops/pmstop1_4.html No, I'm on the search for real roestones - regular oolithes. For the problem oolith/onkoid have a look onto http://userpage.fu-berlin.de/~voelker/Vorlesung_Chemische/karbokomponenten.html Is there no real roestone in the whole USA ? Wolfgang > Many thanks for this literature hint, DHE ! > Sometimes the bigger ones of the regular shaped oolithes are named [quoted text clipped - 29 lines] > > > alias > > > Dr. Rogenstein Oh no, DHE, the Captain reef is an onkoid ore. I found something in http://www.geoinfo.nmt.edu/staff/scholle/permstops/pmstop1_4.html No, I'm on the search for real roestones - regular oolithes. For the problem oolith/onkoid have a look onto http://userpage.fu-berlin.de/~voelker/Vorlesung_Chemische/karbokomponenten.html Is there no real roestone in the whole USA ? Wolfgang > Many thanks for this literature hint, DHE ! > Sometimes the bigger ones of the regular shaped oolithes are named [quoted text clipped - 29 lines] > > > alias > > > Dr. Rogenstein |
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