Show Rocks, Minerals, Fossils and Gems

[ivoire]

A bit of a stretch?

Rock Man3 by Michael Wolf, on Flickr

 

[D7k1]

Deep Water (very fine sedimate matrix), 22-30 MYO

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[PacNWMike]

Famous thrust fault.

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Creag a' Chnocain (Knockan Crag)

 

[D7k1]

Fossil Mold, 12.5 MM long, Keasey Formation (25-30 MYO)

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Have not been able to make a cast of this mold yet, so am not sure of family or species.

 

[D7k1]

Can anyone ID the inclusion in this Deep Water Mudstone from the Keasey formation? The Mollusks are about 50 mm accross. Stone is 15 CM longest direction. This pieces comes from a very large section that fell about 100'. Several other pieces have similar inclusions. Close up shows structure.

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Is it Mineral or Biological? The pieces that have this inclusion type are identical, perhaps a coral?

 

[D7k1]

So I have found a significant "load" of mostly bivalves in a very deep water mudstone. This mudstone is very hard, when it fractures it is a lot like obsidian, extremely sharp and extremely hard. The specimen in this image is 3 x 5mm. The calcium shell has very little identifiable structures, yet the cast part seems "fair" crisp. If the shell was removed perhaps shell parts would be shown in the cast for ID. Would you remove the shell (if so how? acidic acid?). Any ideas on how to soften this mudstone, it is as hard but not as brittle as any shale I have seen. G picks don't see to do anything but an 8 pound sledge works





Imaging done with a Panasonic G9 and Olympus 60mm macro lens using focus stacking.

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