The rock here is basaltic, and the production of volcanic action.
"Young Americans Abroad" by Various
The park region must have been for a long period the seat of volcanic action, for nearly all the rocks are cooled lavas.
"The Western United States" by Harold Wellman Fairbanks
They were of brilliant red volcanic rock.
"Across Unknown South America" by Arnold Henry Savage Landor
The stones were of basalt, which is a volcanic rock, very permanent and durable in character, and as hard almost as iron.
"Rollo on the Rhine" by Jacob Abbott
At Saint Michael's, they dig square holes in the volcanic rocks, and the vines find sustenance.
"Olla Podrida" by Frederick Marryat (AKA Captain Marryat)
The rocks were of volcanic origin, and some of them had crumbled into heaps of ragged debris.
"Masters of the Wheat-Lands" by Harold Bindloss
In California many of the needle rocks are of volcanic origin; others again are basaltic columns.
"The Sailor's Word-Book" by William Henry Smyth
There are, however, especially in the southern portion, ancient and non-volcanic rocks.
"Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1" by Various
Analogy of the structure of some Volcanic Rocks with that of Glaciers.
"Life of Charles Darwin" by G. T. (George Thomas) Bettany
There was nothing but the welter of volcanic waste: rock heaps and boulders and smooth streams of solid lava.
"Astounding Stories of Super-Science, June, 1930" by Various
When thinking of the Aleutian Islands, the image that usually emerges is one of muted shades: Black volcanic rock, darkened sea water, frequently gray skies, soft green ground cover, white snow and that's about it.
In Case of Fire, Grab Cat, Passport and Hunk of Volcanic Rock.
Masih Homadi peered from the crags of jagged black volcanic rocks where his troops had just taken cover and tried to steady his nerves for another assault.
Bear Gulch Reservoir reflects the towers of volcanic rock that give Pinnacles National Monument its name.
Mexico's Popocatepetl volcano is continuing to spout gases and hot rock fragments and it is dusting towns on its flanks with volcanic ash.
Mexican authorities have raised the threat level as Popocatepetl is continuing to spout gases and hot rock fragments and is dusting towns on its flanks with volcanic ash.
Hikers traverse the Valley of Ten Thousand Smokes on the Alaska Peninsula, walking on a sheet of ash and volcanic rock more than 500-feet-thick.
In 1980 Mount St Helens in Washington State suffered a catastrophic landslide that released seething volcanic gases and rock fragments in a cataclysm that destroyed hundreds of square miles of forest.
Twink 's is an alternative-rock take—think live drums and volcanic guitar chords.
A mass of small volcanic rock s nearly the size of Belgium has been discovered floating off the coast of New Zealand.
Mass of volcanic rocks , 'size of Belgium,' floating off New Zealand.
In replicating this sort of experiment within deep-sea volcanic rock, Fisher was embarking on an ambitious experimental program.
This set of swarms seems to be due to rock movement, not to volcanism.
Volcanic ash consists of rock, mineral, and volcanic glass fragments smaller than a tenth of an inch in diameter—or slightly larger than a pinhead.
For our March 2011 Best of Honolulu issue, we visited we visited Volcanic Rock Gym and watched owner Justin Ridgely teach writer, Victoria Wiseman, how to rock climb for the first time.