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  2. Dacite - Wikipedia

    en.wikipedia.org/wiki/Dacite

    Dacite (/ ˈ d eɪ s aɪ t /) is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained ( aphanitic ) to porphyritic texture and is intermediate in composition between andesite and rhyolite .

  3. Nine Sisters - Wikipedia

    en.wikipedia.org/wiki/Nine_Sisters

    The Nine Sisters are a chain of volcanic plugs composed predominantly of dacite. About 20 to 25 million years ago, magma welled up underneath a layer of softer rock and solidified. The softer overlying rock has since eroded away, leaving a distinct rugged shape.

  4. Tholeiitic magma series - Wikipedia

    en.wikipedia.org/wiki/Tholeiitic_Magma_Series

    Rock types of the tholeiitic magma series include tholeiitic basalt, ferro-basalt, tholeiitic basaltic andesite, tholeiitic andesite, dacite and rhyolite. The variety of basalt in the series was originally called tholeiite but the International Union of Geological Sciences recommends that tholeiitic basalt be used in preference to that term. [1]

  5. Black Butte (Siskiyou County, California) - Wikipedia

    en.wikipedia.org/wiki/Black_Butte_(Siskiyou...

    Black Butte (formerly Wintoon Butte, Cone Mountain, Sugar Loaf and Muir's Peak [5]) is a cluster of overlapping dacite lava domes in a butte, [2] a satellite cone of Mount Shasta. [6] It is located directly adjacent to the northbound lanes of Interstate 5 at milepost 742 between the cities of Mount Shasta and Weed, California. The I-5 freeway ...

  6. Tooth of Time - Wikipedia

    en.wikipedia.org/wiki/Tooth_of_Time

    The Tooth of Time is an igneous intrusion of dacite porphyry formed in the tertiary period some 22 to 40 million years ago. It is a geological feature on the Philmont Scout Ranch located five miles (8.0 km) southwest of Cimarron, New Mexico, United States, and is one of Philmont's most popular sights.

  7. Picturesque North Carolina mountain town destroyed by ...

    www.aol.com/picturesque-north-carolina-mountain...

    In Chimney Rock, photos show the once-idyllic village covered in mud and debris, with about half of the businesses on the southern side of the town near Broad River gone from the massive flooding.

  8. La Garita Caldera - Wikipedia

    en.wikipedia.org/wiki/La_Garita_Caldera

    Dacite is a silicic volcanic rock common in explosive eruptions, lava domes and short thick lava flows. There are also large intracaldera lavas composed of andesite , a volcanic rock compositionally intermediate between basalt (poor in silica content) and dacite (higher silica content) in the La Garita Caldera.

  9. AOL Mail for Verizon Customers - AOL Help

    help.aol.com/products/aol-mail-verizon

    AOL Mail welcomes Verizon customers to our safe and delightful email experience!