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A thunderegg (or thunder egg) is a nodule-like rock, similar to a filled geode, that is formed within rhyolitic volcanic ash layers. [1] Thundereggs are rough spheres , most about the size of a baseball —though they can range from a little more than a centimeter (one half inch) to over a meter (three feet) across.
A lithophysa from France A collection of lithophysae "thundereggs" A lithophysa (plural lithophysae, from Greek lithos "stone" + phusa "bubble") [1] is a felsic volcanic rock with a spherulitic structure and interior cavity with concentric chambers. Its outer shape is spherical or lenticular.
Friend_ranch-thunderegg.JPG (800 × 600 pixels, file size: 216 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons.
Thunderegg.jpg (640 × 423 pixels, file size: 54 KB, MIME type: image/jpeg) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
Even though the area has been worked by rockhounds for many years, quality thundereggs are still found at the site. There are also some rare rocks and minerals in central Oregon in or near the Ochoco Mountains, including opals , amethyst , gem quality calcite , cinnabar , selenite , gypsum , and amygdaloid nodules.
Location of Mohave County in Arizona. This is a list of the National Register of Historic Places listings in Mohave County, Arizona.It is intended to be a complete list of the properties and districts on the National Register of Historic Places in Mohave County, Arizona, United States.
The ranch style home was the first ranch home listed on the National Register of Historic Places in Oregon. [35] In addition to the house, which has a full basement, the museum uses a separate building as a gallery. [17] That building, the Northwest Gallery, was formerly used for storage and as a shop, but looks similar to the Rice House. [19]