• Thumbnail for Rock fragment
    A rock fragment, in sedimentary geology, is a sand-sized particle or sand grain that is made up of multiple grains that are connected on the grain scale...
    1 KB (97 words) - 06:51, 31 May 2025
  • Thumbnail for Rock (geology)
    rocks Pebble – Small rock fragment Cobble (geology) – Clast of rock Boulder – Natural rock fragment larger than 10 inches Rock (building material) Rocks...
    31 KB (3,326 words) - 03:20, 29 June 2025
  • Thumbnail for Oldest dated rocks
    determined that a fragment from one of the rocks, nicknamed Big Bertha, contained "a bit of Earth from about 4 billion years ago". The rock fragment contained...
    20 KB (2,290 words) - 10:07, 5 April 2025
  • genre or to completely ignore it. After the late 1970s, progressive rock fragmented into numerous forms. Some bands achieved commercial success well into...
    99 KB (11,227 words) - 23:13, 29 June 2025
  • Lithic fragments, or lithics, are pieces of other rocks that have been eroded down to sand size and now are sand grains in a sedimentary rock. They were...
    3 KB (333 words) - 23:41, 9 October 2024
  • converter's shaft, he was killed when the devices suddenly activated and a rock fragment was propelled right into his face at high speed. She berates Brion for...
    16 KB (1,879 words) - 16:33, 20 June 2025
  • Thumbnail for Clastic rock
    composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks, and smaller grains of rock broken...
    21 KB (2,644 words) - 08:16, 10 June 2025
  • Thumbnail for Boulder
    Boulder (category Rock formations)
    In geology, a boulder (or rarely bowlder) is a rock fragment with size greater than 25.6 cm (10.1 in) in diameter. Smaller pieces are called cobbles and...
    4 KB (327 words) - 07:03, 31 May 2025
  • Thumbnail for Apollo 17 lunar sample display
    The Apollo 17 lunar sample display consists of a Moon rock fragment from a lava Moon stone identified as lunar basalt 70017, the recipient's flag and...
    7 KB (767 words) - 23:03, 9 November 2024
  • Thumbnail for Bedrock
    Bedrock (redirect from Bed rock)
    rock to leave it susceptible to erosion. Bedrock may also experience subsurface weathering at its upper boundary, forming saprolite. Rock fragments can...
    6 KB (508 words) - 17:04, 15 June 2025
  • Thumbnail for Floater (geology)
    Floater (geology) (category Rock formations)
    within a soil or weathering profile. A floater can also be a bigger rock fragment that is detached from the underlying bedrock. Floaters or floats are...
    8 KB (829 words) - 08:17, 10 June 2025
  • Thumbnail for Xenolith
    A xenolith ("foreign rock") is a rock fragment (country rock) that becomes enveloped in a larger rock during the latter's development and solidification...
    7 KB (771 words) - 10:37, 8 June 2025
  • Thumbnail for Uluru
    Uluru (redirect from Ayer's Rock)
    conglomerate. Average composition is 50% feldspar, 25–35% quartz and up to 25% rock fragments; most feldspar is K-feldspar with only minor plagioclase as subrounded...
    57 KB (5,501 words) - 06:22, 28 June 2025
  • Thumbnail for Scree
    Scree is a collection of broken rock fragments at the base of a cliff or other steep rocky mass that has accumulated through periodic rockfall. Landforms...
    22 KB (2,619 words) - 18:02, 4 June 2025
  • Thumbnail for Greywacke
    and small rock fragments or sand-size lithic fragments set in a compact, clay-fine matrix. It is a texturally immature sedimentary rock generally found...
    9 KB (975 words) - 04:25, 1 June 2025
  • Thumbnail for Rock art
    000 recorded rock art sites in Australia. The oldest firmly dated rock-art painting in Australia is a charcoal drawing on a rock fragment found during...
    68 KB (7,728 words) - 20:51, 18 June 2025
  • Thumbnail for Gazzi-Dickinson method
    (larger than 62.5 micrometers) or a finer-grained fragment of another rock type, called a lithic fragment (e.g. a sand-sized piece of shale). These counts...
    5 KB (643 words) - 16:29, 9 July 2020
  • Thumbnail for Pyroclastic rock
    clastic rocks composed of rock fragments produced and ejected by explosive volcanic eruptions. The individual rock fragments are known as pyroclasts. Pyroclastic...
    11 KB (1,144 words) - 18:18, 12 June 2025
  • Thumbnail for Breccia
    BRESH-ee-ə, Italian: [ˈbrettʃa]; Italian for 'breach') is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained...
    25 KB (2,734 words) - 21:40, 24 May 2025
  • Thumbnail for Balancing rock
    Perched block Also known as a perched boulder or perched rock, this is a large, detached rock fragment that most commonly was transported and deposited by...
    15 KB (1,662 words) - 20:22, 15 June 2025
  • Thumbnail for Pyroclastic flow
    Flows can deposit less than 1 meter to 200 meters in depth of loose rock fragment. The kinetic energy of the moving cloud will flatten trees and buildings...
    19 KB (2,353 words) - 17:19, 18 April 2025
  • potassium and argon measurements, while the newer method requires only one rock fragment or mineral grain and uses a single measurement of argon isotopes. 40Ar/39Ar...
    9 KB (1,101 words) - 20:48, 19 March 2025
  • sedimentary rock composed primarily of carbon Conglomerate – Sedimentary rock composed of smaller rock fragments Coquina – Sedimentary rock that is composed...
    15 KB (2,336 words) - 09:11, 11 March 2025
  • rock veneer is a geomorphic formation in which rock fragments (clasts) of gravel or cobble size form a thin cover over a surface or hillslope. Rock veneers...
    4 KB (642 words) - 00:39, 15 April 2025
  • Thumbnail for Weathering rind
    discrete rock fragment formed by the processes of weathering. The inner boundary of a weathering rind approximately parallels the outer surface of the rock fragment...
    9 KB (1,176 words) - 22:17, 19 May 2020
  • Thumbnail for Moon rock
    than half a kilogram of material was returned. In 1993, three small rock fragments from Luna 16, weighing 200 mg, were sold for US$ 442,500 at Sotheby's...
    34 KB (3,415 words) - 12:56, 25 June 2025
  • Thumbnail for Pebble
    A pebble is a clast of rock with a particle size of 4–64 mm (0.16–2.52 in) based on the Udden-Wentworth scale of sedimentology. Pebbles are generally considered...
    7 KB (832 words) - 07:03, 31 May 2025
  • Thumbnail for Volcaniclastics
    of broken fragments (clasts) of volcanic rock. These encompass all clastic volcanic materials, regardless of what process fragmented the rock, how it was...
    11 KB (914 words) - 23:05, 24 May 2025
  • Thumbnail for Sedimentary rock
    and other minor processes. Clastic sedimentary rocks are composed of rock fragments (clasts) that have been cemented together. The clasts are commonly individual...
    65 KB (7,871 words) - 14:44, 30 June 2025
  • Thumbnail for Beachrock
    Beachrock (redirect from Beach rock)
    beachrock can consist of a variable mixture of shells, coral fragments, rock fragments of different types, and other materials. It can also contain scattered...
    5 KB (598 words) - 09:33, 14 February 2025