New Members Tom Jeffery Posted August 26, 2015 New Members Posted August 26, 2015 Hi. My friend found these two at the site of a house he is building. We are in the Eastern Cape of South Africa, near Grahamstown. The more irregularly shaped one is about 300mm long. The smoother one about 200mm. I'm hoping someone will be able to tell us what they are. If the photos are not good enough please let me know and I will take better quality ones. Thanks, Tom.
Auspex Posted August 26, 2015 Posted August 26, 2015 The 'bowling pin' looks like a water-shaped chunk of sedimentary rock, maybe sandstone. 1 "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease!
Pumpkinhead Posted August 26, 2015 Posted August 26, 2015 The first one could be a sponge, or maybe a fossilized cast of an infilled burrow. 1
abyssunder Posted August 26, 2015 Posted August 26, 2015 The second one,I think,contains trace fossils. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library
Auspex Posted August 27, 2015 Posted August 27, 2015 The second one,I think,contains trace fossils. If it is a cross section of the bedding planes, it may be a record of cross-bedded varves. I wish I could see it in-hand! "There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant “Try to learn something about everything and everything about something.” - Thomas Henry Huxley >Paleontology is an evolving science. >May your wonders never cease!
abyssunder Posted August 27, 2015 Posted August 27, 2015 I was referring to picture 3, now I see that is specimen 1 in longitudinal transverse section. It`s sedimentary rock,I agree,and looks like it has cross-lamination layering. Regarding to its fine structure, lamination sometimes could be destroyed by bioturbation after deposition. In picture 1 in the left side of the specimen I think I see some kind of bioturbation, probably is in the upper layer sediment. " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library
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