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[6] [7] The world's largest known opal-filled thunderegg, weighing 1.75 tons (1600 kg), is housed at the museum. [ 7 ] [ 28 ] The thunderegg is Oregon's state rock. [ 29 ] Other items include azurite , Oregon sunstone , amber, copper crystals, zeolites , morganite , and agate among others.
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. [18] [19]
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.
This is a complete List of National Historic Landmarks in Oregon. The United States National Historic Landmark (NHL) program is operated under the auspices of the National Park Service , and recognizes buildings, structures, districts, objects, and similar resources nationwide according to a list of criteria of national significance. [ 1 ]
This list of museums in Oregon encompasses museums defined for this context as institutions (including nonprofit organizations, government entities, and private businesses) that collect and care for objects of cultural, artistic, scientific, or historical interest and make their collections or related exhibits available for public viewing.
There are listings in all of Oregon's 36 counties. The National Register of Historic Places recognizes buildings, structures, objects, sites, and districts of national, state, or local historic significance across the United States. [1] Out of over 90,000 National Register sites nationwide, [2] Oregon is home to more than 2,000 NRHP listings. [3]
Location Coordinates Year first lit Automated Year deactivated Current Lens Height Cape Arago Light: Coos Bay: 1866 (First) 1934 (Current) 1966 2006 (Now tribal land) None 44 ft (13 m) Cape Blanco Light: Port Orford
This list of cities and unincorporated communities in the U.S. state of Oregon includes all incorporated cities and many unincorporated communities, arranged in alphabetical order. Unincorporated communities are identified with italic type. Cities are the only form of municipal government incorporated in Oregon. [1]