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Geological applications of sea-floor photography
Bowin, C.O.; Chase, R.l.; Hersey, J.B. (1967). Geological applications of sea-floor photography, in: Hersey, J.B. (Ed.) Deep-sea photography. pp. 117-140
In: Hersey, J.B. (Ed.) (1967). Deep-sea photography. The John Hopkins Oceanographic Studies, 3. The John Hopkins Press: Baltimore. 310 pp.
In: The John Hopkins Oceanographic Studies. ISSN 0271-2229
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| Auteurs | | Top |
- Bowin, C.O.
- Chase, R.l.
- Hersey, J.B.
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| Abstract |
Photographs of the sea floor provide valuable geological information, and are especiaIly useful when taken in conjunction with a program of echo sounding, seismic profiling, dredging, and coring. In this chapter aspects of the methods and role of deep-sea photography in submarine geology are illustrated by accounts of several investigations. The combined operation of photography and dredging is exemplified in a study of the Mid-Atlantic Ridge. lnformation from bottom photographs of the north waIl of the Puerto Rico Trench has been combined with information from echo sounding, seismic profiling, and dredged samples to determine the structure and stratigraphy of an undersea area. A photographic survey of the Mona Canyon between Puerto Rico and Hispaniola has shown that outcrops of sedimentary rocks occur as deep as 3,700 m below sea level. A discussion of several camera lowerings in the Balearic Basin and in the Tyrrhenian Sea- western Mediterranean -indicate how bottom photographs may be useful in regional as well as detailed studies. An intensive photographic survey of a portion of the western and southern slopes of Plantagenet Bank, south of Bermuda, shows how bottom photographs can help reveal the nature of mountain slopes of undersea ranges. Finally, undersea photographs of the Seychelles- Mauritius Ridge, Indian Ocean, combined with dredged material, suggest that the ridge is almost completely covered by at least a veneer of calcareous rocks and sediments, and indicate the added value of continuous photo-montages of the sea floor . |
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