On the Strata of the Earth

abundance acid amber ancient animals aqua regia Arkhangelsk become beneath black soil bones burned cavities chemical clay color consider contain created crystals deposits depths described Earth Earth’s interior Earth’s surface earthquakes elephants especially excavated exposed feet fire flood flow force forests frozen layer geological glass gold grains heat Ilek River islands known Korolev lake Lake Lacha land Las Vegas lime limestone Lomonosov material Mikhail Lomonosov minerals mines mixed modern Russian moss moun natural northern observations occur Ocean origin paragraph particles peat places plants portion primordial produce pyrite rain reason region rise rivers rock salt rocky saltpeter salty sandstone sandy sazhens in thickness seafloor seashells shale shells shore Siberia silt silver sometimes speculate stony mountains strata subterranean sulfur summits swingletree tains Tibet traditional Russian unit translation trees types University of Nevada valleys various veins Vershok versts washed wild stone