From this part descends a black scoriaceous tract; very rugged, and covered with a scanty vegetation of scattered bushes as far down as the sea. ❋ Unknown (2004)
It is covered with short, yellowish grass through which the burnt-up, scoriaceous lava rock protrudes in rough masses. ❋ Unknown (2003)
To the South-west the plain is bounded by ridges of scoriaceous basalt, and by a buttress of rock called Jabal Ayr, like Ohod, about three miles distant from the town. ❋ Unknown (2003)
Where the lime has been caught up by the scoriaceous fragments of the lower surface of the stream, it is converted into groups of beautifully radiated fibres resembling arragonite. ❋ Unknown (2003)
Accordingly we all left the house after breakfast, following the track marked (H), which led us precipitously down, till we landed on the surface of the large crater, an immense sheet of scoriaceous lava cooled suddenly from a state of fusion; the upheaved waves and deep hollows evidencing that congelation has taken place before the mighty agitation has subsided. ❋ Various (N/A)
At the end of an hour, the ascent becoming every moment more abrupt, we had passed the belt of trees and bushes, and reached the smooth and scoriaceous cone, which, during the rainy season, appears from the bay to be covered with a velvety mantle of green. ❋ Various (N/A)
Near them is the red sandstone, lying under the basalt, and baked to a scoriaceous cinder. ❋ Various (N/A)
They are never scoriaceous, for the steam with which they were charged was not allowed to expand and distend them with steam blebs. ❋ William Harmon Norton (1900)
One may distinguish each successive flow by its dense central portion, often jointed with large vertical columns, and the upper portion with its mass of confused irregular columns and scoriaceous surface. ❋ William Harmon Norton (1900)
In a pile of successive sheets of lava each flow may be distinguished and its thickness measured; for the surface of each sheet is glassy and scoriaceous, while beneath its upper portions the lava of each flow is more dense and stony. ❋ William Harmon Norton (1900)
Gases and steam escaping from other similar masses may leave them hollow, when they are termed bombs, or may pit their surfaces with irregular bubble-cavities, when they are called scoriae or scoriaceous. ❋ Charles Morris (1877)
Glowing at first as a white-hot liquid, the lava soon cools at the surface to red and then to black; cinder-like scoriaceous masses form on its surface and in front of the slowly-advancing mass; clouds of steam and other vapor rise from it, and little cones are thrown up from its surface; but many years may elapse before the mass is cooled through. ❋ Charles Morris (1877)
Rains and rivers now acted upon the scoriaceous integument, grinding it to sand and carrying it down to the depths and cavities. ❋ 1821-1902 (1860)
A little higher up the creek its banks are formed by strata of very heavy and hard scoriaceous basalt, having a bright metallic lustre when broken. ❋ Brevet Col. J.C. Fremont (1851)
By measurement, the river above is 870 feet wide, immediately contracted at the fall in the form of a lock, by jutting piles of scoriaceous basalt, over which the foaming river must present a grand appearance at the time of high water. ❋ Brevet Col. J.C. Fremont (1851)
The walls, which were perfectly vertical, and disposed like masonry in a very regular manner, were composed of a brown-colored scoriaceous lava, similar to the light scoriaceous lava of Mt. Etna, Vesuvius, and other volcanoes. ❋ Brevet Col. J.C. Fremont (1851)
