Pyroclastic volcanic plateaus are produced by massive pyroclastic flows and they are underlain by pyroclastic rocks : agglomerates, tephra, volcanic ashes cemented into tuffs, mafic or felsic.
32.
The lava flows are more viscous, and therefore shorter and thicker, than the corresponding Hawaiian eruptions; it may or may not be accompanied by production of pyroclastic rock.
33.
Cockercombe tuff is a greenish-grey, hard pyroclastic rock formed by the compression of volcanic ash and is found almost exclusively in the south-eastern end of the Quantock Hills.
34.
Most of this detritus is erosional in nature, but pyroclastic rocks created by hot avalanches of extruded lava also contribute . thick olivine basalt found in the Jaz Murian depression may also come from Bazman.
35.
These include broad and shallow craters with diameters of with pyroclastic rocks, cryptodomes with diameters of up to and heights of, scoria cones reaching a height of with lava flow fields and individual lava flows.
36.
During the Kingdom of the Two Sicilies, Scafati was the seat of textile workshops and of an Ferdinand II . Scafati was damaged by falls of pyroclastic rocks in the course of the 1707 Mount Vesuvius eruption.
37.
In the Skeena Mountains, separated outcrops of pillow lava and volcanic breccia are generally found side by side on the summits of sharp rugged mountain ridges, with presumably temporally-associated pyroclastic rocks having collected downslope.
38.
Again, this formation is confined to the limits of the caldera, and represents another return to erosion and sedimentary deposition within a caldera lake, though with layers of pyroclastic rock showing that the volcanism had not entirely finished.
39.
Made chiefly of Eocene pyroclastic rocks, Mount Bahr Aseman is situated in a central Iranian range, Sahand-Bazman volcanic range or belt, a mountain range which was formed mainly during Eocene volcanism and that stretches approximately from Sahand Volcano in the north-west of Iran to Bazman Volcano in the south-east of Iran.
40.
Made chiefly of Eocene andesite and pyroclastic rocks, Mount Hazar or Hazaran is situated in a central Iranian range, Sahand-Bazman volcanic range or belt, a mountain range which was formed mainly during Eocene volcanism and that stretches approximately from Sahand Volcano in the north-west of Iran to Bazman Volcano in the south-east of Iran.
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