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  2. Astoria Column - Wikipedia

    en.wikipedia.org/wiki/Astoria_Column

    May 2, 1974. The Astoria Column is a tower in the northwest United States, overlooking the mouth of the Columbia River on Coxcomb Hill in Astoria, Oregon. Built in 1926, the concrete and steel structure is part of a 30-acre (12 ha) city park called Astor Park. The 125-foot (38 m)-tall column has a 164-step spiral staircase ascending to an ...

  3. Geology of Ivory Coast - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Ivory_Coast

    The geology of Ivory Coast is almost entirely extremely ancient metamorphic and igneous crystalline basement rock between 2.1 and more than 3.5 billion years old, comprising part of the stable continental crust of the West African Craton. [2] Near the surface, these ancient rocks have weathered into sediments and soils 20 to 45 meters thick on ...

  4. Conservation and restoration of ivory objects - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    The conservation and restoration of ivory objects is the process of maintaining and preserving objects that are ivory or include ivory material. Conservation and restoration are aimed at preserving the ivory material and physical form along with the objects condition and treatment documentation. Activities dedicated to the preservation of ivory ...

  5. African ivories - Wikipedia

    en.wikipedia.org/wiki/Kongo_ivories

    African ivories are objects and materials that are created from ivory or include ivory material that comes from the continent of Africa. The ivory from Africa would become widely sought after by the 14th century due in part to the poorer quality of Asian ivory. [1] While Asian ivory is brittle, more difficult to polish, and tends to yellow with ...

  6. Museum of History in Granite - Wikipedia

    en.wikipedia.org/wiki/Museum_of_History_in_Granite

    Each is 100 feet (30 m) long. Conceived as a historic record of humanity designed to last for four millennia, the Museum of History in Granite is a collection of over 900 large granite outdoor panels. [ 1] The museum was conceived and commissioned by Jacques-André Istel and its lead artist is Gene Britton.

  7. Astoria, Oregon - Wikipedia

    en.wikipedia.org/wiki/Astoria,_Oregon

    41-03150 [5] GNIS feature ID. 2409744 [3] Website. www.astoria.or.us. Astoria is a port city and the seat of Clatsop County, Oregon, United States. Founded in 1811, Astoria is the oldest city in the state and was the first permanent American settlement west of the Rocky Mountains. [6]

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