from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Chiefly British A dark, fine-grained igneous rock; diabase.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A fine-grained basaltic rock

from the GNU version of the Collaborative International Dictionary of English

  • n. A dark, crystalline, igneous rock, chiefly pyroxene with labradorite.
  • n. Coarse-grained basalt.
  • n. Diabase.
  • n. Any dark, igneous rock composed chiefly of silicates of iron and magnesium with some feldspar.

from The Century Dictionary and Cyclopedia

  • n. A name given by Haüy to a rock of the basalt family, called by some a basaltic greenstone, the deception implied in the name referring to the difficulty of distinguishing the rock from other varieties also designated as greenstone.


from The American Heritage® Dictionary of the English Language, 4th Edition

French dolérite, from Greek doleros, deceitful (from its easily being mistaken for diorite), from dolos, trick; see del-2 in Indo-European roots.


  • In addition, the rain forests are restricted to dolerite-derived red clay soils, which are highly moisture retentive.

    Eastern Zimbabwe montane forest-grassland mosaic

  • The Karoo dolerite dykes and sills were formed when molten rock intruded into the pre-existing rocks of the Ecca and Beaufort shales.

    Nama Karoo

  • Sandstone and shale from the Karoo sequence, together with dolerite intrusions, characterize the geology.

    Drakensberg montane grasslands, woodlands and forests

  • The rocks of Hirta are predominantly a complex of dolerite and microgranites with gabbro along the castellated west coast, intruded by basalt dykes.

    St Kilda (Hirta) National Nature Reserve, United Kingdom

  • Although still infertile by world standards, soils here are generally higher in nutrient content than those in western Tasmania, especially the rich soils on dolerite substrate.

    Tasmanian temperate forests

  • Areas of lower elevation largely consist of post Carboniferous sediments overlying a basement of Cambrian rocks, with significant intrusions of Jurassic dolerite.

    Tasmanian temperate forests

  • The forests of the Amatole Mountains occur further east and inland, at 32. 7° south and 27. 2° east, where shale, sandstone, mudstone, and dolerite are the main geological elements.

    Knysna-Amatole montane forests

  • The Western Mountain Karoo forms part of the Great Escarpment, a mountainous landscape comprising mainly of Karoo rocks with dolerite intrusions forming many of the peaks and ridges.

    Succulent Karoo

  • A dramatic period of igneous activity followed the deposition of these sediments in the Jurassic, with the injection of massive amounts of dolerite into the Parmeener Supergroup.

    Tasmanian Wilderness, Australia

  • Due to its resistant nature dolerite covers a vast tract of the WHA.

    Tasmanian Wilderness, Australia


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