Information om | Engelska ordet PYROCLASTICS

Exempel på hur man kan använda PYROCLASTICS i en mening

• Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as lava or explodes violently into the atmosphere to fall back as pyroclastics or tuff.
• The deposits of the Vetrovoy Isthmus include volcanic-tectonic dislocations, pumice pyroclastics, aeolian-ash deposits and soil-tephra formations.
• The inland is formed by tablelands, ridges and creeks, its surface covered with blocky debris from which lavas and pyroclastics emerge.
• Its peak comprises a nepheline phonolite dome, an intrusion through earlier pyroclastics and phonolite flows, suggesting that the volcanic origins of the peak were as a pyroclastic cone, followed by a plugging with the nepheline dome.
• The summit cone is formed by lapilli, pyroclastics and scoria, one half has a white colour and the other half is black; some areas are white from fumarolic alteration.
• Following the caldera collapse, lavas were erupted from the northern part of the island and the caldera-rim fissure zone, scoria and lavas from the caldera-wall fissure zones, pyroclastics and lavas from intracaldera cones, and recent pyroclastic fall deposits on the outer cone.
• The volcano is constructed from andesite and dacite containing hornblende and anhydrite; its pyroclastics are all older than Lascar.
• Lava of this nature, like basalt, is usually associated with less explosive eruptions; more viscous lavas with lower mafic content, like dacites and rhyolites, can also flow, but tend to be more closely associated with eruptions of greater explosiveness and the formation of pyroclastics.
• Dark green subaerial pyroclastics composed of chlorite and sericite are uncommon and have sustained preferential compression in response to shear throughout the Link Lake Deformation Zone.
• Strombolian and lava fountaining took place, generating pyroclastics including lapilli and lava bombs, which fell over the southeastern flank for three months.
• These deposits were described as volcanic rocks composed mostly by tuff, that includes basaltic bombs (composed by Pyroxene and pseudomorphs from this, along with Olivine on adjacent pyroclastics), accidental lithics and occasional wood from conifers, in the form of small pieces to large logs.

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