Sedimentary rocks at outcrop and hand sample scales.
Meteorite impact ash deposits of ultramafic composition, deposited in a marine setting during the Archean Fig Tree Group of Barberton Mountain Land, South Africa.
Some of the oldest chert in the world.
Stem with needles, or a raggedy cone (?), Conemaugh Formation, Corridor H.
Selected locations showing truncated cross bed sets are labeled.
Nice fine sandstone with a stack of cross-bedded packages.
A nice example of cross-stratification in a fine sandstone
Fine-grained fallout from a bolide impact during the Archean.
South end of Wills Mountain in the Cumberland Narrows, Cumberland, Maryland. Quartzite capped mountain.
Spechty Kopf Diamictite outcrop located on the western end of the north side of Sideling Hill, along I-68 in Maryland.
Differential weathering between some strata of The Rockwell Formation, from Sideling Hill along I-68 in Maryland.
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