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Hello Prometheus; welcome to the Boards.

These appear to be ‘glacial striations’ from the Late Paleozoic Era:





”During the Late Paleozoic Era, massive glaciers covered large continental areas of the Southern Hemisphere. Evidence for this glaciation includes layers of til (sediments deposited by glaciers) and striations (scratch marks) in the bedrock beneath the till.”

Source: The Changing Earth: Exploring Geology and Evolution by James Monroe, Reed Wicander, page 33.



Dr. Troglodyte


“Quis custodiet ipsos custodes?“ - Decimus Junius Juvenalis
Η άγνοια είναι η μητέρα του μύθου και του μυστηρίου.


“Numero, Pondere et Mensura“


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Subject Views Written By Posted
Massive Ancient African Earthworks? 1131 Prometheus 09-May-18 22:46
Re: Massive Ancient African Earthworks? 408 Dr. Troglodyte 09-May-18 23:28
Re: Massive Ancient African Earthworks? 234 Prometheus 11-May-18 14:45
Re: Massive Ancient African Earthworks? 188 SallyA 12-May-18 02:22
Re: Massive Ancient African Earthworks? 173 Prometheus 15-May-18 11:06
Re: Massive Ancient African Earthworks? 310 DUNE 10-May-18 08:21
Re: Massive Ancient African Earthworks? 250 gulsbo 10-May-18 18:36
Re: Massive Ancient African Earthworks? 228 Eddie Larry 10-May-18 19:31
Re: Massive Ancient African Earthworks? 379 carolb 10-May-18 19:55
Re: Massive Ancient African Earthworks? 228 Prometheus 11-May-18 14:58
Re: Massive Ancient African Earthworks? 213 SallyA 12-May-18 20:34
Re: Massive Ancient African Earthworks? 171 Prometheus 15-May-18 10:51
Re: Massive Ancient African Earthworks? 216 SallyA 12-May-18 02:14
Re: Massive Ancient African Earthworks? 175 Prometheus 15-May-18 11:27
Re: Massive Ancient African Earthworks? 191 SallyA 18-May-18 22:57
Re: Massive Ancient African Earthworks? 225 SallyA 12-May-18 03:21
Re: Massive Ancient African Earthworks? 214 Prometheus 15-May-18 12:18
Re: Massive Ancient African Earthworks? 245 SallyA 18-May-18 02:41
Re: Massive Ancient African Earthworks? 121 spqr 20-May-18 19:17
Re: Massive Ancient African Earthworks? 136 SallyA 20-May-18 21:48
Re: Massive Ancient African Earthworks? 103 spqr 20-May-18 23:00
Re: Massive Ancient African Earthworks? 158 SallyA 22-May-18 00:48
Re: Massive Ancient African Earthworks? 280 spqr 22-May-18 02:43


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