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geology

(Encyclopedia)geology, science of the earth's history, composition, and structure, and the associated processes. It draws upon chemistry, biology, physics, astronomy, and mathematics (notably statistics) for suppor...

Holy Roman Emperors (table)

(Encyclopedia)HOLY ROMAN EMPERORS(including dates of reign) Saxon dynasty Salian or Franconian dynasty Hohenstaufen dynasty and rivals Interregnum, 1254–73 Hapsburg, Luxemburg, and other dynasties ...

paleomagnetism

(Encyclopedia)paleomagnetism, study of the intensity and orientation of the earth's magnetic field as preserved in the magnetic orientation of certain minerals found in rocks formed throughout geologic time. Paleom...

Braille

(Encyclopedia)Braille brāl [key], in astronomy, a small asteroid notable because it has the same atypical geologic composition as the larger asteroid Vesta. In 1999 the space probe Deep Space 1 passed within 16 mi...

escarpment

(Encyclopedia)escarpment or scarp, long cliff, bluff, or steep slope, caused usually by geologic faulting (see fault) or by erosion of tilted rock layers. An example of a fault scarp is the north face of the San Ja...

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