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rock
(Encyclopedia) rock, aggregation of solid matter composed of one or more of the minerals forming the earth's crust. The scientific study of rocks is called petrology. Rocks are commonly divided,…lava
(Encyclopedia) lavalavaläˈvə [key], molten rock that erupts on the earth's surface, either on land or under the ocean, by a volcano or through a fissure. It solidifies into igneous rock that is also…Wedgwood, Josiah
(Encyclopedia) Wedgwood, Josiah, 1730–95, English potter, descendant of a family of Staffordshire potters and perhaps the greatest of all potters. At the age of nine he went to work at the plant…Principal Deserts of the World
Deserts are arid regions, generally receiving less than ten inches of precipitation a year, or regions where the potential evaporation rate is twice as great as the precipitation. The world'…Miocene epoch
(Encyclopedia) Miocene epochMiocene epochmīˈəsēn [key], fourth epoch of the Tertiary period in the Cenozoic era of geologic time (see Geologic Timescale, tablegeologic timescale, table), lasting from…Geology of the Grand Canyon: Corrasion.
WEATHERING.CORRASION.Mr. G. K. Gilbert has embodied in his admirable monograph on the Henry Mountains, a chapter on Land Sculpture, which sets forth in most logical and condensed from the…American Indian Archaeological Sites
The American Indian archaeological record is one of the richest in the world. There are tens of thousands of American Indian sites in the Southwest alone, where the dry climate has…The Congress of Women: The Pacific Northwest
by Mrs. Abigail Scott Duniway ArtGeorge Meredith's NovelsThe Pacific Northwest Mrs. Abigail Scott Duniway is a native of Illinois. She was born in 1834. Her parents were John F. Scott and…volcano
(Encyclopedia) volcano, vents or fissures in the earth's crust through which gases, molten rock, or lava, and solid fragments are discharged. Their study is called volcanology. The term volcano is…Assyria
(Encyclopedia) CE5 Assyrian Empire (c.650 b.c.) AssyriaAssyriaəsĭrˈēə [key], ancient empire of W Asia. It developed around the city of Ashur, or Assur, on the upper Tigris River and south of the…Trending
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