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Pennebaker, D. A.
(Encyclopedia) Pennebaker, D. A. (Donn Alan Pennebaker), 1925–2019, pioneering documentary filmmaker, b. Evanston, Ill. His first film, Daybreak Express (1958), is a five-minute short detailing New…panda
(Encyclopedia) panda, name for two unrelated nocturnal Asian mammals of the order Carnivora, red pandas, genus Ailurus, and the giant panda, Ailuropoda melanoleuca. Red pandas, also known as lesser…vermilion
(Encyclopedia) vermilion, vivid red pigment of durable quality. It is a chemical compound of mercury and sulfur and is known as red sulfide of mercury; it was formerly obtained by grinding pure…blood count
(Encyclopedia) blood count, method for determining the number of red (erythrocytes) and white (leukocytes) blood cells in a certain volume of blood. This test can be used as a preliminary step in…Rock Creek Park
(Encyclopedia) Rock Creek Park: see National Parks and Monuments (table)national parks and monuments (table).Steep Rock Lake
(Encyclopedia) Steep Rock Lake, 4 mi (6.4 km) long and 3 mi (4.8 km) wide, SW Ont., Canada, W of Lac des Mille Lacs. It is the site of important iron ore mining. Part of the lake was drained to…quartzite
(Encyclopedia) quartzite, usually metamorphic rock composed of firmly cemented quartz grains. Most often it is white, light gray, yellowish, or light brown, but is sometimes colored blue, green,…concretion
(Encyclopedia) concretion, mass or nodule of mineral matter, usually oval or nearly spherical in shape, and occurring in sedimentary rock. It is formed by the accumulation of mineral matter in the…talus
(Encyclopedia) talustalustāˈləs [key], deposit of rock fragments detached from cliffs or mountain slopes by weathering and piled up at their bases. A talus is a common geologic feature in regions of…Cashel
(Encyclopedia) Cashel Cashel kăˈshəl [key] [Irish,=castle], town, Co. Tipperary, S central Republic of…Trending
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