explosion breccia

explosion breccia

[ik′splō·zhən‚brech·ə]
(petrology)
Breccia resulting from volcanic eruption or a phreatic explosion.
References in periodicals archive ?
An impact origin for the breccia was suggested by Dietz (1960) who reported "a quarry which revealed a large mass of what may be explosion breccia."
Radiocarbon Laboratory Material Location Date Number Dated 16 990 [+ or -] 150 B-18632 peat (macrofossil) Nuglungnugtu k River 17 420 [+ or -] 260 B-60718 peat (macrofossil) Lake Rhonda 17 630 [+ or -] 800 W-3489 peat (macrofossil) Whitefish Th aw Pond 17 740 [+ or -] 110 B-75731 peat (macrofossil) Lumpy Draine d Lake 17 740 [+ or -] 220 B-75529 peat (macrofossil) Tempest Lake 17 910 [+ or -] 150 (1) B-18549 detrital twigs Kiliwooligor uk Creek 16 880 [+ or -] 120 B-60716 wood (macrofossil) Egg Lake 17 980 [+ or -] 100 B-71983 sediment Egg Lake (1) in reworked alluvium Sequences of bedded surge deposits, airfall lapilli beds, massive pyroclastic flows, and explosion breccia can be traced through many fresh exposures in 10-40 m high cliffs around the Devil Mountain Lakes Maar (Fig.
At least two layers of explosion breccia, each 1-5 m thick, are exposed in bluffs on the southwest shoreline of North Devil Mountain Lake, and similar breccias are exposed at other sites around the lakes (Fig.