Amygdaloidal sentence example

amygdaloidal
  • Crystals are found as a rarity in the amygdaloidal cavities of igneous rocks.
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  • This consists largely of rocks of igneous origin, of which the amygdaloidal diabase of Klipriversberg forms the type.
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  • The copper of the Lake Superior region is in the Keweenawaii system, chiefly in its sedimentary and amygdaloidal parts.
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  • The Old Man presents a characteristic section, for it exhibits a thick pile of massive, current-bedded red sandstones, resting, near the foot of the pinnacle, upon a thin bed of amygdaloidal porphyrite, which in its turn lies unconformably upon steeply inclined flagstones.
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  • Near Haco's Ness in Shapinsay there is a small exposure of amygdaloidal diabase which is of course older than that in Hoy.
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  • These plateaus are composed of nearly horizontal sheets of basalt - columnar, amorphous or amygdaloidal - which, in Ben More, in Mull, attain a thickness of more than 3000 ft.
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  • It occurs in a series of amygdaloidal dolerites or diabases, and in the associated sandstones and conglomerates.
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  • The lower (Ashangi group) consists of basalts and dolerites often amygdaloidal.
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  • The axis along which they have been elevated runs north-east and south-west, and on either flank a series of " green rocks " appears, consisting of altered amygdaloidal andesitic lavas, intrusive dolerites, coarse gabbros and diorites, and at Beagh-beg and Creggan in central Tyrone ancient rhyolitic tuffs.
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