Information om | Engelska ordet BASALTS

Exempel på hur man kan använda BASALTS i en mening

• Among his most well-known pieces are the pietre sonore ("sounding stones") – large sculptures made of limestones or basalts that alter their appearance at human contact.
• The region has a long history of volcanism; millions of years ago, Columbia River basalts covered vast areas of the western Snake River watershed, while the Snake River Plain was a product of the Yellowstone volcanic hotspot.
• The Columbia Plateau Province is a large igneous province of flood basalts erupted in Miocene and early Pliocence epochs across the states of Washington, Oregon, Idaho, Nevada, and California.
• This period also started with fissural basalts, but ended with violent eruptions of pyroclastic flows.
• Ancient Hawaiians living on the slopes of Mauna Kea relied on its extensive forests for food, and quarried the dense volcano-glacial basalts on its flanks for tool production.
• The term includes both the circulation of the well-known, high-temperature vent waters near the ridge crests, and the much-lower-temperature, diffuse flow of water through sediments and buried basalts further from the ridge crests.
• Its geology consists of slightly metamorphosed post-Ordovician volcanic rocks, mainly rhyolites with breccias, andesites and basalts.
• These columnar basalts were formed from lava flows during the mid- to late-Miocene Epoch, some 14 to 16 million years ago.
• In 1763 he made observations in Auvergne, recognizing that the prismatic basalts were old lava streams, comparing them with the columns of the Giant's Causeway in Ireland, and referring them to the operations of extinct volcanoes.
• Attractions such as the great kauri trees of the Waipoua Forest (including the country's largest tree, Tane Mahuta), the historic waterfront villages of Kohukohu and Rawene, cafes, the Horeke basalts, beaches, historic buildings, nature walks, horse trekking, boat trips, and fishing are bringing more visitors every year.
• The volcanic rocks are of basaltic type, consisting mostly of alkaline basalts, some hawaiites, and some gabbro intrusions, especially on the islet Toopua.
• Mount Girnar is a major igneous plutonic complex which intruded into the basalts towards the close of the Deccan Trap period.
• The basalts contain minerals that are interesting to rockhounds including agate, zeolites such as stilbite and gmelinite, and calcite.
• Onset of magmatic sea-floor spreading was accompanied by volcanic eruptions of picrites and basalts in the Paleocene at the Davis Strait and Baffin Bay.
• "The Aristarchus plateau is one of the most geologically diverse places on the moon: a mysterious raised flat plateau, a giant rille carved by enormous outpourings of lava, fields of explosive volcanic ash, and all surrounded by massive flood basalts," said Mark Robinson, principal investigator of the Lunar Reconnaissance Orbiter Camera at Arizona State University.
• The compositions of peridotite nodules found in certain basalts are of special interest along with diamond pipes (kimberlite), because they provide samples of Earth's mantle brought up from depths ranging from about 30 km to 200 km or more.
• Verneshots have been proposed as a causal mechanism explaining the statistically unlikely contemporaneous occurrence of continental flood basalts, mass extinctions, and "impact signals" (such as planar deformation features, shocked quartz, and iridium anomalies) traditionally considered definitive evidence of hypervelocity impact events.
• This is an area of renewed intra-plate volcanism in the North American Plate, with rocks no older locally than 800,000 years, that overlay an extinct rift zone that produced the more than 5 million years old crustal basement tholeiitic flood basalts of the Snæfellsnes peninsula.
• Thick tuffs were deposited in the Pago caldera, and the southern rim was buried by lavas composed of picritic basalts, andesites, and trachytes.
• Other minerals found in the basalts include calcite, magnetite, copper, and quartz (often as amethyst).

Förberedelsen av sidan tog: 423,56 ms.