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Examples

  • I could see rounded cobbles of a previous lava flow that had been completely eroded away, located beneath the layers of volcanics that you see in the picture.

    Castle Rock - South Table Mountain - The Panda's Thumb 2010

  • I could see rounded cobbles of a previous lava flow that had been completely eroded away, located beneath the layers of volcanics that you see in the picture.

    Castle Rock - South Table Mountain - The Panda's Thumb 2010

  • This subsection consists mostly of folded, faulted, and generally metamorphosed sediments and volcanics of the Franciscan Complex and less extensive Cretaceous sediments of the Great Valley Sequence.

    Leeward Hills (Bailey) 2009

  • The mountainous Mid-Coastal Sedimentary ecoregion lies outside of the coastal fog zone and is typically underlain by massive beds of sandstone and siltstone in contrast to the volcanics of Ecoregion 1d.

    Ecoregions of Oregon (EPA) 2009

  • Cryic soils developed on the mixed geology of mostly Tertiary volcanics and Tertiary intrusives, with only minor areas of Precambrian rocks in the Black Range.

    Ecoregions of New Mexico (EPA) 2009

  • Streams draining the quartzite-dominated Uinta Mountains and portions of the Wasatch Front that are underlain by acidic intrusive volcanics tend to be non-alkaline, low in nutrients, and low in total dissolved solids.

    Ecoregions of Utah (EPA) 2009

  • This mountainous ecoregion is underlain by Cenozoic volcanics and has been affected by alpine glaciations.

    Ecoregions of the United States-Level III (EPA) 2009

  • Volcanism in the Pliocene epoch overtopped the existing Miocene volcanics of Ecoregion 4b.

    Ecoregions of Oregon (EPA) 2009

  • It is underlain by sedimentary and metamorphic rock in contrast to the adjoining Cascades which are composed of volcanics.

    Ecoregions of the United States-Level III (EPA) 2009

  • The mountainous Mid-Coastal Sedimentary ecoregion lies outside of the coastal fog zone and is typically underlain by massive beds of sandstone and siltstone in contrast to the volcanics of Ecoregion 1d.

    Ecoregions of Oregon (EPA) 2009

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