. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. Fig. 34. 118°38'\V, 32''N. Depth 549 m. Inshore continental slope off southern California. ( Navy Electronics Laboratory photo by C. J. Shipek.) A green mud bottom highly disturbed by benthonic activity showing a mound and depression of biological origin, plus numerous tracks formed by sea-urchins (echinoids).. Fig. 35. 38° 20'N, 28° Ol'W. Depth 1628 m. Mid-Atlantic Ridge near Pico, Azores. Area of picture approx. 1 m by 70 cm. (Photo by ) An example of one of many such (racks found on soft nuiddy bottoms bei
. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. Fig. 34. 118°38'\V, 32''N. Depth 549 m. Inshore continental slope off southern California. ( Navy Electronics Laboratory photo by C. J. Shipek.) A green mud bottom highly disturbed by benthonic activity showing a mound and depression of biological origin, plus numerous tracks formed by sea-urchins (echinoids).. Fig. 35. 38° 20'N, 28° Ol'W. Depth 1628 m. Mid-Atlantic Ridge near Pico, Azores. Area of picture approx. 1 m by 70 cm. (Photo by ) An example of one of many such (racks found on soft nuiddy bottoms being made by a scapliopod-like animal with two long arms. The track shows a characteristic angularity due to the area swept out when the rigid shell is 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 Hill, M. N. (Maurice Neville), 1919-. New York : Interscience Pub.
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
