Abstract
DURING the 1972 Midlante cruise of the RV Jean Charcot to survey a limited area of the rift valley south of the Azores, a dredge (CH-DR11) was taken at a depth of 1,360 fathoms in a depression near the foot of the eastern wall at latitude 36° 49.3′ N and longitude 33° 15′ W. Two types of rocks were recognized from their structure and their degree of weathering. One type is “slab-like” rock, 2 to 13 cm in diameter and 1 to 2 cm thick (Fig. 1a and b). The other type of rock consists of oval glassy pebbles (1 to 5 cm in diameter, Fig. 1c) which were observed to jump and explode, one or two at a time, for 3 d after the dredge haul was emptied on to the deck of the ship.
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References
Krause, D. C., thesis, Univ. California, San Diego (1962).
Aumento, F., Can. J. Earth Sci., 5, 1 (1968).
Greeley, R., and Hyde, J. H., Geol. Soc. Am. Bull., 83, 2397 (1972).
Muir, I. D., Tilley, C. E., and Scoon, J. H., J. Petrol., 7 (2) 193 (1966).
Miyashiro, A., Shido, F., and Ewing, M., Contrib. Mineral. Petrol., 23 (2), 117 (1969).
Hekinian, R., and Aumento, F., Mar. Geol., 14, 47 (1973).
Chaigneau, M., and Bordet, P., C.r. hebd. Séanc. Acad. Sci. Paris, 255, 3019 (1962).
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HEKINIAN, R., CHAIGNEAU, M. & CHEMINEE, J. Popping Rocks and Lava Tubes from the Mid-Atlantic Rift Valley at 36° N. Nature 245, 371–373 (1973). https://doi.org/10.1038/245371a0
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DOI: https://doi.org/10.1038/245371a0
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