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The Dedham granite was formed during the Ediacaran Period of the Precambrian era about 610 million years ago and is one of the oldest rocks in the Boston basin. [2] Dedham granites to the south and west of the basin are older outcrops from around 630 million years ago, while outcrops to the north of the basin are younger and closer to 596 million years old. [2]
"Imperial Porphyry" from the Red Sea Mountains of Egypt A waterworn cobble of porphyry Rhyolite porphyry from Colorado; scale bar in lower left is 1 cm (0.39 in). Porphyry (/ ˈ p ɔːr f ə r i / POR-fə-ree) is any of various granites or igneous rocks with coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass.
Alkali feldspar granite, some varieties of which are called 'red granite', [1] is a felsic igneous rock and a type of granite rich in the mineral potassium feldspar (K-spar). It is a dense rock with a phaneritic texture. The abundance of K-spar gives the rock a predominant pink to reddish hue; peppered with minor amounts of black minerals. [2] [3]
Relatives of missing men who want to provide family DNA reference samples for the effort to identify remains can contact the Indiana State Police missing persons hotline at 833-466-2653 or the ...
Apple stock received a rare downgrade to "sell" from an analyst on Tuesday. The downgrade highlights premium-valuation concerns and some negative headlines in recent months.
You can get TurboTax for 30% off on Amazon today. AOL. Old Navy's Break a Sweat Sale has activewear from $2 — shop our top picks here. AOL. AOL reviewed: This smart humidifier helps me sleep ...