As it got darker, Griber put on his headlamp and made his way to an area of rock debris, where he jettisoned his snowboard.
32.
The 1817 eruption deposited several feet of ash and " scoria " rock debris on the northeastern caldera rim, with ash falling on Unalaska Island.
33.
It is constructed of alternating layers of lava and ash, and other fragmental volcanic rock debris formed by explosive eruptions over the past several hundred years.
34.
This peak, known colloquially and by surveyors as the Mountain , is a glacial moraine of rock debris pushed by a glacial lobe before it receded.
35.
One patented Highwall mining systems use augers enclosed inside the Pushbeam that prevent the mined coal from being contaminated by rock debris during the conveyance process.
36.
The " Dr . No "-type bad guys include Mr . Fish, who looks like a badly drawn Don Knotts, and some guy named Rock Debris.
37.
Attrition occurs when waves causes loose pieces of rock debris ( scree ) to collide with each other, grinding and chipping each other, progressively becoming smaller, smoother and rounder.
38.
The water was unleashed to scour the hillside below, both soil in the case of prospecting for metal veins, and then rock debris after a vein had been found.
39.
During the Upper Carboniferous and Lower Permian ( " Rotliegendes " ) large quantities of rock debris were deposited in intramontane basins and onto the foreland of the mountain range.
40.
Rock debris could be sluiced away by hushing, and the water also used to douse fires created to break down the hard rock and veins, a method known as fire-setting.
