. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 1 EMERY AND HULSEMANN: SUBMARINE CANYONS 35. Fig. 17.—Profiles of submarine canyons compared with lithol- ogy where known. Symbols are as follows: arrow, shore- line; K, Cretaceous; E, Eocene; M, Miocene; P, Plio- cene; Q, Quaternary; R, postglacial (on sea floor letters show sites of dateable rock samples). From Emery (1960a, fig. 48). WATER Those who have spent much time aboard ship watching traces be- ing drawn by echo sounders frequently observe echoes from dense schools of fish which are often present at the tops
. Allan Hancock Pacific expeditions. [Reports]. Scientific expeditions. NO. 1 EMERY AND HULSEMANN: SUBMARINE CANYONS 35. Fig. 17.—Profiles of submarine canyons compared with lithol- ogy where known. Symbols are as follows: arrow, shore- line; K, Cretaceous; E, Eocene; M, Miocene; P, Plio- cene; Q, Quaternary; R, postglacial (on sea floor letters show sites of dateable rock samples). From Emery (1960a, fig. 48). WATER Those who have spent much time aboard ship watching traces be- ing drawn by echo sounders frequently observe echoes from dense schools of fish which are often present at the tops of slopes, including those at the sides and heads of submarine canyons. Some verification is provided by the reportedly greater catch of fish at the head and sides. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Allan Hancock Foundation. Los Angeles, University of Southern California Press
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