enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Porphyry (geology) - Wikipedia

    en.wikipedia.org/wiki/Porphyry_(geology)

    "Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / 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.

  3. Porphyritic - Wikipedia

    en.wikipedia.org/wiki/Porphyritic

    Porphyritic texture in a granite. This is an intrusive porphyritic rock. The white, square feldspar phenocrysts are much larger than crystals in the surrounding matrix; eastern Sierra Nevada, Rock Creek Canyon, California. A porphyritic volcanic sand grain, as seen under the petrographic microscope. The large grain in the middle is of a much ...

  4. Porphyry - Wikipedia

    en.wikipedia.org/wiki/Porphyry

    Porphyry (geology), an igneous rock with large crystals in a fine-grained matrix, often purple, and prestigious Roman sculpture material; Shoksha porphyry, quartzite of purple color resembling true porphyry mined near the village of Shoksha, Karelia, Russia; Porphyritic, the general igneous texture of a rock with two distinct crystal ...

  5. Category:Porphyritic rocks - Wikipedia

    en.wikipedia.org/wiki/Category:Porphyritic_rocks

    Category: Porphyritic rocks. 7 languages. ... Mons Porphyrites; Q. Quartz-porphyry; Quenast quarry This page was last edited on 4 July 2023, at 08:23 (UTC). ...

  6. Mons Porphyrites - Wikipedia

    en.wikipedia.org/wiki/Mons_Porphyrites

    Mons Porphyrites (today Jabal Abu Dukhkhan) is the mountainous site of a group of ancient quarries in the Red Sea Hills of the Eastern Desert in Egypt. Under the Roman Empire, they were the only known source of the purple "imperial" variety of porphyry. They were exploited between the 1st and 5th centuries AD. [1]

  7. Archaeologists Think They Might Have Found The Real Noah’s Ark

    www.aol.com/archaeologists-think-might-found...

    Soil samples from atop the highest peaks in Turkey reveal human activity and marine materials. Dating of the rock and soil from the location match with Biblical timing of Noah’s Ark.

  8. Phenocryst - Wikipedia

    en.wikipedia.org/wiki/Phenocryst

    A phenocryst is an early forming, relatively large and usually conspicuous crystal distinctly larger than the grains of the rock groundmass of an igneous rock. Such rocks that have a distinct difference in the size of the crystals are called porphyries , and the adjective porphyritic is used to describe them.

  9. Colon cancer: Measuring ‘biological age’ may help predict who ...

    www.aol.com/colon-cancer-measuring-biological...

    One’s biological age, which measures the body’s physiological state, may help predict who is at risk for developing colon polyps, a known risk factor for colorectal cancer.