World rocks photo collection
Siltstone
Rock type:
Age:
485 millions years
Submitted 4 years 3 months ago by rock.
Russia, Khanty-Mansiysk autonomous okrug, Subpolar Ural, Petravozh creek. Gray-green siltstones, sandstones with dykes gabbro. Sedimentary rocks consist: quartz, feldspar, sericite, chlorite. Accesory: hematite, magnetite, leicocsen, zircon, epidote. Fossil: Aristocystites (?) sp., Fascicrinus cf. foliacens Mil sp. nov., Pentagonocyclicus cf. concentricus Yelt., Veryhachium trisulcum Downie Baltisphaeridium longispinosum Ets. Pogureyskaya series. Cambrian (Furongian) - Lower Ordovican (Tremadocian). Dykes gabbro: Upper Ordovican - Lower Silurian.
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