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Fillet (geology) In planetary geology the term fillet describes a fine-grained deposit in an apron shape configuration that partially or entirely surround boulders on the surface of the Moon. [1] [2] Fillets are a morphological expression of lunar soil development. Image taken by astronaut Al Shepard of the boulder named 'Filleted Rock ...
September 19. ( 2021-09-19) –. October 24, 2021. ( 2021-10-24) Aidan Gillen hosts Killers of the Cosmos in animated form as the Gumshoe Detective. Promotional image for Killers of the Cosmos. Killers of the Cosmos is a documentary science television series hosted by Aidan Gillen. Aired by the Science Channel, it premiered on September 19, 2021.
Pictured Rocks National Lakeshore is a U.S. National Lakeshore in the Upper Peninsula of Michigan, United States. It extends for 42 mi (68 km) along the shore of Lake Superior and covers 73,236 acres (114 sq mi; 296 km 2 ). The park has extensive views of the hilly shoreline between Munising and Grand Marais in Alger County, with picturesque ...
A volcanic rock from Italy with a relatively large six-sided phenocryst (diameter about 1 mm) surrounded by a fine-grained groundmass, as seen in thin section under a petrographic microscope. Extrusive rock refers to the mode of igneous volcanic rock formation in which hot magma from inside the Earth flows out (extrudes) onto the surface as ...
A cataclastic rock is a type of fault rock that has been wholly or partly formed by the progressive fracturing and comminution of existing rocks, a process known as cataclasis. Cataclasis involves the granulation, crushing, or milling of the original rock, then rigid-body rotation and translation of mineral grains or aggregates before ...
Porphyry (geology) Porphyry ( / ˈpɔːrfəri / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate -rich, generally aphanitic matrix or groundmass. In its non-geologic, traditional use, the term porphyry usually refers to the purple-red form of ...
In geology, rock (or stone) is any naturally occurring solid mass or aggregate of minerals or mineraloid matter. It is categorized by the minerals included, its chemical composition, and the way in which it is formed. Rocks form the Earth's outer solid layer, the crust, and most of its interior, except for the liquid outer core and pockets of ...
A magma series is a series of compositions that describes the evolution of a mafic magma, which is high in magnesium and iron and produces basalt or gabbro, as it fractionally crystallizes to become a felsic magma, which is low in magnesium and iron and produces rhyolite or granite. Calc-alkaline rocks are rich in alkaline earths ( magnesia and ...