Pillow Basalts - U.S. National Park Service
Pillow basalts are present near the top of the Resurrection ophiolite in Kenai Fjords National Park. These pillow basalts were formed 57-58 million years ago in a subaqueous environment above a subduction zone and then accreted onto the North American continent.
Pillow lava - Wikipedia
Pillow lavas are lavas that contain characteristic pillow-shaped structures that are attributed to the extrusion of the lava underwater, or subaqueous extrusion. Pillow lavas in volcanic rock are characterized by thick sequences of discontinuous pillow-shaped masses, commonly up to one meter in diameter.
Pillow Basalt FAQ - U.S. National Park Service
2015年2月28日 · Pillow basalt is a volcanic igneous rock that forms when lava of basaltic compositionis erupted underwater. The rapid cooling of the lava by cold water on all sides forms the pillow-shaped bodies, which can then break open and extrude more of …
What are the different types of basaltic lava flows and how do they ...
2010年5月6日 · There are three types of basalt lava flows: pillow, pahoehoe, and a'a. Pillow lava. Pillow lavas are volumetrically the most abundant type because they are erupted at mid-ocean ridges and because they make up the submarine portion of seamounts and large intraplate volcanoes, like the Hawaii-Emperor seamount chain.
枕状玄武岩 - 百度百科
枕状玄武岩（Pillow Basalt）是采集于西藏日喀则地区德村的岩石 标本 。 灰黑色，中细粒结构，枕状构造，主要矿物：斜长石、橄榄石、辉石。 可作铸石原料和 建筑石材 。 [1] 枕状玄武岩（Pillow Basalt）是采集于西藏日喀则地区德村的岩石标本。
Pillow Basalts: Where They Form, Their Geological Characteristics, …
2024年9月14日 · Pillow basalts are lava formations resembling pillows or cushions. They form when basaltic lava erupts underwater and cools rapidly. Their importance lies in understanding volcanic processes and the conditions of early Earth.
Basaltic Lava Flows - U.S. National Park Service
Pillow Basalts. Pillow lavas form during subaqueous eruptions when the lava surface is rapidly quenched but the interior continues to inflate as the eruption continues. Most pillow lavas have basaltic compositions.
Pillow basalt - Geology Wiki
Pillow basalt is a type of Basalt in which lava erupts underwater or flows into the sea. Contact with the water quenches the surface and the lava forms a distinctive pillow shape, through which the hot lava breaks to form another pillow.
USGS: Volcano Hazards Program Glossary - Pillow lava
Mounds of elongate lava pillows formed by repeated oozing and quenching of hot basalt. First, a flexible glassy crust forms around the newly extruded lava , forming an expanded pillow. Next, pressure builds until the crust breaks and new basalt …
Pillow Basalt Science - VWR
Pillow basalt is a volcanic igneous rock that forms when lava of basaltic compositions erupts underwater. But, unlike columnar basalt, pillow basalt is formed in the fastest cooling environment possible on Earth. Underwater, where the water steals the lava's heat so rapidly (instantly) that it forms a unique texture, pillows.