An Angus/Argo study of the neovolcanic zone along the East Pacific rise from the Clipperton fracture zone to 12°N |
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| Authors: | E Uchupi W C Schwab R D Ballard J L Cheminee J Francheteau R Hekinian D K Blackman H Sigurdsson |
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| Institution: | (1) Woods Hole Oceanographic Institution, 02543 Woods Hole, MA;(2) U.S. Geological Survey, 02543 Woods Hole, MA;(3) Institute de Physique du Globe de Paris, 4, Place Jussieu, 75230 Paris, Cedex 05, France;(4) IFREMER, Departement Geosciences Marines, Centre de Brest, B.P. 337, 29273 Brest Cedex, France;(5) Brown University, Providence, RI, 02883;(6) University of Rhode Island, 02881 Kingston, RI |
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| Abstract: | Still photographs and video images collected along the Neovolcanic Zone of the East Pacific Rise from 10°15′N to 11°53′N show
that recent volcanic sheet flows, possibly less than 100 years old, are superimposed on an older sediment-laden pillow terrane.
This recent activity is restricted to a narrow zone that crosses two topographic highs at 10°55′N and 11°26′N and diminishes
along-axis away from these highs. The association of recent sheet flows with older flows and collapse structures on the overlapping
spreading centers at 11°45′N supports the evolutionary model for the occurrence and evolution of overlapping spreading centers
by MacDonald and others (1986, 1988). |
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