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2. Marble Island - Wikipedia

   en.wikipedia.org/wiki/Marble_Island

   Marble Island is composed of a type of sedimentary rock called wacke, laced with quartzite. It is the quartzite that gives the island its white, marble-like appearance. [1] Marble Island is bare rock, located above the treeline, and with only a small amount of plant life, primarily lichens and mosses.

3. Quartz - Wikipedia

   en.wikipedia.org/wiki/Quartz

   Quartz. Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO 4 silicon–oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO 2. Quartz is, therefore, classified structurally as a framework silicate mineral ...

4. Breccia - Wikipedia

   en.wikipedia.org/wiki/Breccia

   Breccia (/ ˈbrɛtʃiə, ˈbrɛʃ -/) is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix. The word has its origins in the Italian language, in which it means "rubble". [1] A breccia may have a variety of different origins, as indicated by the named types including sedimentary ...

5. Mount Pentelicus - Wikipedia

   en.wikipedia.org/wiki/Mount_Pentelicus

   Pentelic marble is calcitic in composition with quartz as an accessory mineral. It is fine grained with sporadic calcitic fossil clasts . [ 2 ] [ 5 ] Pentelic marble is divided into 3 units distinguishable by δ 13 C and δ 18 O values. δ 13 C and δ 18 O values have been used to precisely match marbles from the Acropolis to their source quarries.

6. AOL Mail

   mail.aol.com

   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

7. James Knight (explorer) - Wikipedia

   en.wikipedia.org/wiki/James_Knight_(explorer)

   On 20 November 1765, "two Inuit boys informed the commander at Fort Churchill, Moses Norton, that their Elders had told them a story about two ships having been wrecked on Marble Island many years ago." [2] The ruins of Knight's settlement on Marble Island were discovered in 1768, by Company explorer Samuel Hearne.

8. Quartzite - Wikipedia

   en.wikipedia.org/wiki/Quartzite

   Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals. The grainy, sandpaper-like surface is glassy in appearance. Minor amounts of former cementing materials, iron oxide, silica, carbonate and clay, often migrate during recrystallization, causing streaks and lenses to form within the quartzite. [1 ...

9. Dacite - Wikipedia

   en.wikipedia.org/wiki/Dacite

   Dacite (/ ˈdeɪsaɪt /) is a volcanic rock formed by rapid solidification of lava that is high in silica and low in alkali metal oxides. It has a fine-grained (aphanitic) to porphyritic texture and is intermediate in composition between andesite and rhyolite. It is composed predominantly of plagioclase feldspar and quartz.