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W.O. Kupsch fonds Geology√
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Archaeology

Archaeology. Some weapon points of early big-game hunters, from 7 to 12 thousand years ago. Top row (left to right) Scottsbluff, Eden, Angostura; bottom row (left to right) Clovis Fluted, Folsom Fluted, Plainsview. After Wedel, 1961.

Archaeology

Archaeology. Provisional chart showing approximate time relationship of certain archaeological sites and complexes in Plains area. Wedel, 1961.

Arcs

Arcs. Primary double mountain arc of western United States. Jacobs et al., 1959, p. 296.

Arcs

Arcs. Active primary and secondary arcs of South America. Jacobs et al., 1959, p. 301.

Arcs

Arcs. Active primary and secondary arcs and lineaments of North America. Jacobs et al., 1959, p. 305.

Arcs

Generalized section across an active single island arc. Jacobs et al., 1959, p. 298.

Arcs

Arcs. Possible active arcs of North America in Carboniferous time. Jacobs et al., 1959, p. 319.

Arctic Ordivician fauna

Arctic Ordivician fauna (Nelson, 1959, pl. 2). Number: 1 Hormatoma (gastropod) 2 Winnipegoceras (cephalopod) 3 Lambeoceras (cephalopod) 4 Maclurites (gastropod)

Results 106 to 120 of 1917