Malá Pravčická brána
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The Malá Pravčická Brána is a natural sandstone arch that is about 2.3 m high and 3.3 m wide. It is located in Bohemian Switzerland near the red-marked main hiking route between Mezní Louka and Vysoká
Malá Pravčická Brána
Sandstone
Videos
Sandstone is a clastic sedimentary rock composed mainly of sand-sized silicate grains, cemented together by another mineral. Sandstones comprise about 20–25% of all sedimentary rocks.
Malá Pravčická brána
…The Malá Pravčická Brána (German: Kleines Prebischtor) is a natural sandstone arch that is about 2.3 m (7.5 ft) high and 3.3 m (11 ft) wide. It is located in Bohemian Switzerland near the red-marked main hiking route (E3 European…
Cut slab of sandstone
Alcove in the Navajo Sandstone
Kokh-type tombs cut into the multicoloured sandstone of Petra
Sand grains of quartz with hematite coating providing an orange colour