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searching for Columnar jointing 33 found (97 total)

Mount Useful (171 words) [view diff] exact match in snippet view article find links to article

covers 354 hectares (875 acres). The mountain has basalt cliffs with columnar jointing on the east and south-east sides. A fire lookout tower and a communications

Monmouth Creek complex (248 words) [view diff] exact match in snippet view article find links to article

The spines are covered by welded breccia close to their bases and columnar jointing extends into the welded sequence. The most elevated lava flows and

Strand Fiord Formation (152 words) [view diff] exact match in snippet view article find links to article

Dragon Cliff 300 m (980 ft) tall. The Strand Fiord Formation contains columnar jointing units that are usually 1 to 3 m (3 to 10 ft) in diameter. The formation

Po Pin Chau (293 words) [view diff] exact match in snippet view article find links to article

the High Island Reservoir, the island is known for its hexagonal columnar jointing po po pooiong. The island was originally a cape connected to the mainland

Pilot Rock (Oregon) (1,001 words) [view diff] exact match in snippet view article

million-year-old Siskiyou Mountains nearby. Pilot Rock has a large amount of columnar jointing, created when the magma cooled. The joints are tilted about 20 degrees

St. Francois Mountains (1,393 words) [view diff] exact match in snippet view article find links to article

of columnar jointing in igneous rhyolite, the same process that formed Devils Tower in Wyoming and the Giant's Causeway in Ireland. The columnar jointing

Black Sturgeon River (Thunder Bay District) (665 words) [view diff] exact match in snippet view article

Fault, which runs north–south. The valley also contains sills with columnar jointing which are related to the Midcontinent Rift System. The Black Sturgeon

Trap rock (852 words) [view diff] exact match in snippet view article find links to article

Research. vol. 86, no. 1–4, pp. 93–96 Spry, A. (1962). "The origin of columnar jointing, particularly in basalt flows". Journal of the Geological Society

Bombo Headland Quarry Geological Site (961 words) [view diff] exact match in snippet view article find links to article

contrasts markedly with the grey-black latite, which displays spectacular columnar jointing elsewhere in the quarry. Isolated columns 5–5 meters in height stand

Glass House Mountains National Park (2,402 words) [view diff] exact match in snippet view article find links to article

alkali rhyolite. This mountain also has good examples of vertical columnar jointing and has caves. There is evidence of early 1950s quarrying activities

Geology of the Isle of Skye (1,170 words) [view diff] exact match in snippet view article find links to article

lavas to form sills that are up to 90m thick. They commonly display columnar jointing, such as in the upper part of the Kilt Rock at Staffin. During this

List of rock formations of New Zealand (468 words) [view diff] exact match in snippet view article find links to article

Wave erosion, volcanic rock and sea stacks Rock spires with basaltic columnar jointing 45°55′50″S 170°26′00″E / 45.93056°S 170.43333°E / -45.93056; 170

Devils Postpile National Monument (1,497 words) [view diff] exact match in snippet view article find links to article

evenly, which is why the columns are so long and so symmetrical. Columnar jointing occurs when certain types of lava contract while cooling. A glacier

Lokitaung (893 words) [view diff] exact match in snippet view article find links to article

is up to 50 meters (160 ft) thick, and many display characteristic columnar jointing. The basalts have been dated to 36 million years ago, though it is

Fingal's Cave (1,231 words) [view diff] exact match in snippet view article find links to article

Stephen W. Morris (2009) "Nonequilibrium scale selection mechanism for columnar jointing". PNAS 2009 106 (2) 387-392 Haswell-Smith (2004) p. 124 "Show Caves

Dhinodhar Hills (876 words) [view diff] exact match in snippet view article find links to article

near- vertical, dike-like tabular intrusions with well-developed columnar jointing, and a roughly circular ring breached to the east, enclosing a pronounced

Nephelinite (647 words) [view diff] exact match in snippet view article find links to article

Columnar jointing in melilite-olivine nephelinite from the Southern Balcones volcanic and intrusive rocks, Uvalde County, Texas.

North Mountain (Nova Scotia) (561 words) [view diff] exact match in snippet view article

201 million year old sequence of tholeiitic basalts, which contains columnar jointing. The basalts also extend under the Bay of Fundy and parts of it are

Albuquerque volcanic field (864 words) [view diff] exact match in snippet view article find links to article

pond that consists of a massive gray basalt with weakly developed columnar jointing occupies the crater of Vulcan. Radial, sinuous lava tubes 8 to 20 inches

High Island (Hong Kong) (1,277 words) [view diff] exact match in snippet view article

Volcanic tuffs with hexagonal columnar jointing at East Dam of High Island Reservoir.

Vulcan (inactive volcano) (684 words) [view diff] exact match in snippet view article

pond that consists of a massive gray basalt with weakly developed columnar jointing occupies the crater of Vulcan. Radial, sinuous lava tubes 8 to 20

Canadian Cascade Arc (7,437 words) [view diff] exact match in snippet view article find links to article

The spines are covered by welded breccia close to their bases and columnar jointing extends into the welded sequence. The most elevated lava flows and

Milbanke Sound Group (1,514 words) [view diff] exact match in snippet view article find links to article

contains one or more basaltic lava flows that form well-preserved columnar jointing. Like other volcanic deposits in the Milbanke Sound Group, little

Tessellation (6,042 words) [view diff] exact match in snippet view article find links to article

tessellation of irregular convex polygons. Basaltic lava flows often display columnar jointing as a result of contraction forces causing cracks as the lava cools

Bidar district (4,629 words) [view diff] exact match in snippet view article find links to article

characteristics of spherical weathering leaving massive hard cores. Columnar jointing is predominantly developed in these rocks, besides horizontal joints

Watchung Mountains (4,086 words) [view diff] exact match in snippet view article find links to article

composed of extrusive igneous trap rock, they display characteristic columnar jointing and stacked lava flows. These features are readily noted along the

Vilama (caldera) (3,761 words) [view diff] exact match in snippet view article

section is poorly welded and light brown to pink in colour, with columnar jointing. A transitional area separates the 1–50 metres (3 ft 3 in – 164 ft

Arctic Cordillera (5,056 words) [view diff] exact match in snippet view article find links to article

Heiberg Island at Dragon Cliff, 300 m (980 ft) tall. It contains columnar jointing units that are usually 1 to 3 m (3 ft 3 in to 9 ft 10 in) in diameter

Eigg (7,791 words) [view diff] exact match in snippet view article find links to article

pitchstone erupted into a valley during the Eocene epoch. It displays columnar jointing formed as the lava cooled. Outcrops of an underlying conglomerate

Visokoi Island (1,984 words) [view diff] exact match in snippet view article find links to article

years by an alternation of pyroclastic rocks and lava flows with columnar jointing, cut by dykes, building one volcano. Later the eastern cinder cones

Mount Cayley volcanic field (6,987 words) [view diff] exact match in snippet view article find links to article

to the bottom of some lavas, indicating subaqueous volcanism, the columnar jointing at the edges of the lavas, indicating rapid cooling, and the absence

Ulu Peninsula (2,969 words) [view diff] exact match in snippet view article find links to article

(BAS) geological work on the island, 1985-86, from the excellent columnar jointing exhibited on the feature. 63°58′S 58°04′W / 63.967°S 58.067°W /

Mount Churchill (8,353 words) [view diff] exact match in snippet view article find links to article

mostly covered by ice hundreds of meters thick, but lava flows with columnar jointing and tephra deposits form outcrops, indicating that Mount Churchill