Siltstone

Rock type: 
Age: 
385 millions years

Siltstone with trilobite - Ductina vietnamica. Guangxi, Hunan and Guizhou Province of China. Devonian.

Rock type: 
Age: 
232 millions years

Russia, Khabarovsk territory, Khekhtsir range. Dark gray tuffogenic siltstone. Krasnorechenskaya series. Thickness - 2750 metres. Fossil (not found here, finds east): ammonites - Arcestes; pelecipods - Halobia cf. charlina Mojs., Posidonia subwengensis Kipar.; foraminifera. Upper Triassic. Carnian.

Rock type: 
Age: 
135 millions years

Russia, Khabarovsk Territory, small Khekhtsir range. Dark gray siltstones with interlayers (up to 10 cm thick) of greenish-gray fine-grained polymictic sandstones. Pionerskaya series. Thickness - 500 metres.  Lower Cretaceous. Valanginian.

Rock type: 
Age: 
135 millions years

Russia, Khabarovsk Territory, Big Khekhtsir range. Dark gray siltstones with interlayers (up to 10 cm thick) of greenish-gray fine-grained polymictic sandstones. Pionerskaya series. Thickness - 500 metres. Accurate dating of age - no. Fossil - yes (in another area).

Rock type: 
Age: 
485 millions years

Russia, Komi Republic, Subpolar Ural, upper reaches of the Little Lemva river. Gray-green siltstones. 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).

Rock type: 
Age: 
485 millions years

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.

Rock type: 
Age: 
485 millions years

Russia, Komi Republic, Subpolar Ural, upper reaches of the Little Lemva river. Gray-green siltstones. 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).

Rock type: 
Age: 
190 millions years

Russia, Chita region, Pogromnoye gold deposit. Carbon siltstones with quartz veins. Ikagiyskaya series. Lower Jurassic.

Rock type: 
Age: 
187 millions years

Russia, Magadan region, left side of the Duck river. Quartz-feldspar siltstones. Lower Jurassic.

Rock type: 
Age: 
187 millions years

Russia, Magadan region, left bank of the Kolyma river. Quartz-feldspar siltstones with quartz veins. Lower Jurassic.