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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.
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.
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]
Mill Creek Wilderness is a wilderness area located in the Ochoco National Forest of central Oregon.It was established in 1984 and comprises 17,400 acres (7,040 ha). [1] Of the three wilderness areas in the Ochoco National Forest - Mill Creek, Bridge Creek, and Black Canyon - Mill Creek is the largest and most heavily used.
This list of botanical gardens and arboretums in Oregon is intended to include all significant botanical gardens and arboretums in the U.S. state of Oregon. [1] [2] [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
Map of the United States with Oregon highlighted. Oregon is a state located in the Western United States. All population data is based on the 2020 census and 2010 census and the Census Bureau's annual estimates. [1] All area data is based on the 2010 US Gazetteer files. There are 241 municipalities.
George T. Gerlinger State Experimental Forest, administered by the Oregon Department of Forestry as part of its West Oregon District [6] McDonald State Forest, north of Corvallis [7] [8] [9] Van Duzer State Forest, now part of the H. B. Van Duzer Forest State Scenic Corridor [10]