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Pillar Rock (other)
Pillar Rock may refer to: *Pillar Rock (Washington) *Pillar Rock (California) Morro Rock (Salinan: ''Le'samo; ''Chumash: ''Lisamu; Spanish: ''El Morro'') is a volcanic plug in Morro Bay, California, on the Pacific Coast at the entrance to Morro Bay harbor. A causeway connects it with the shore, making it a tied is ... *Pillar Rock, a rock formation in England, see Pillar (Lake District) {{Geodis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pillar Rock (Washington)
Pillar Rock is a pillar-like monolith in the Columbia River, near its mouth in the state of Washington (state), Washington. Originally rising 75-100 feet, it was TNT, dynamited and reduced in height to about 25 feet above the water to serve as a navigational aid and light. The Lewis and Clark Expedition camped twice near the rock, on November 7 and November 25, 1805. The name "Pillar Rock" also refers to a small village on the river's north shore, opposite the rock. As recently as 1851, the village was home to a small group of the Kathlamet band of Chinookan peoples, Chinook Indians under the headship of a man named Tolillicum. References Landforms of Wahkiakum County, Washington Populated places in Wahkiakum County, Washington {{WahkiakumCountyWA-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pillar Rock (California)
Morro Rock (Salinan: ''Le'samo; ''Chumash: ''Lisamu'''; Spanish: ''El Morro'') is a volcanic plug in Morro Bay, California, on the Pacific Coast at the entrance to Morro Bay harbor. A causeway connects it with the shore, making it a tied island. The rock is protected as the Morro Rock State Preserve. Geology The Morro Rock is one of 13 volcanic plugs (remnant necks of extinct volcanoes), lava domes, and sheetlike intrusions between Morro Bay on the north and Islay Hill on the south, all in San Luis Obispo County. It is composed mostly of dacite, an igneous, volcanic rock, and partially of petrified bird feces, which have compacted into the plug over the years. It is a groundmass of plagioclase, with amphibole (hornblende), biotite, pyroxene (augite), quartz, and glass; phenocrysts of plagioclase. Its silica dioxide (SiO2) content can range from 63 to 69 percent. The dacite volcanic plugs, lava domes, intrusive sheets, and felsitic rhyolite-dacite between Morro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
