Acasta Gneiss Radiometric Dating

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Acasta Gneiss . Radiometric dating , or radioactive dating , is a method astronomers use to study a rock's age . This method is critical in learning about the Solar System's formation, as rocks from the Solar System can be studied to find how long ago the rock was formed and how old the Solar System is . When billions of atoms collect into a . . .
Radiometric Dating Game Life Skills: . . . rock is the meta-igneous Acasta Gneiss of Canada that is dated at 4 .04 billion years old . 2 Table1 Most Commonly Used Isotope Pairs Parent Isotope Daughter Isotope Half-life (years) Usefulness (years) 14C (carbon-14) 208Pb (lead-208) 87Sr (strontium-87)
Acasta HeliFlight takes its name from the Acasta Gneiss , a rocky outcrop on Tlicho land in the Slave geological province roughly 300 km north of Yellowknife . Using radiometric dating , this rock - named for the nearby Acasta River east of Great Bear Lake - is said to have formed 4 billion years ago making it the oldest known intact piece of . . .
Formation . The metamorphic rock exposed in the outcrop was previously a granitoid that formed 4 .03 billion years ago, an age based on radiometric dating of zircon crystals at 4 .031 Ga . The Acasta Gneiss is important in establishing the early history of the continental crust . Acasta Gneiss was formed in the Basin Groups unofficial period of the Hadean eon, which came before the Archean: see . . .
Formation . The metamorphic rock exposed in the outcrop was previously a granitoid that formed 4 .2 billion years ago, an age based on radiometric dating of zircon crystals at 4 .2 Ga . The Acasta Gneiss is important in establishing the early history of the continental crust . Acasta Gneiss was formed in the Basin Groups unofficial period of the Hadean eon, which came before the Archean: see . . .
Acasta Gneiss : at approximately 4 .03 billion years-old, the tonalite gneiss is the oldest rock exposed on the surface of the planet . Courtesy Mark Ryan I recently attended a geology seminar sponsored by the Geological Society of Minnesota .The event took place at Macalester College in St . Paul, and was led by Jeff Thole, laboratory supervisor and instructor in the college's Geology Department .
The Shield is made up of areas of rocks of distinctive ages . Apart from the Acasta gneiss , the oldest are found in Saglek Bay and near Hebron Fjord in Labrador and are about 3 .6 billion years old . Other massive slabs are dated at 2 .9-2 .5 billion years, 1 .8-1 .7 billion years and 1 .3-0 .9 billion years .
The Acasta Gneiss is a tonalite gneiss in the Slave craton in Northwest Territories, Canada . The rock body is exposed on an island about 300 kilometres north of Yellowknife . The rock of the outcrop was metamorphosed 3 .58 to 4 .031 billion years ago and is the oldest known intact crustal fragment on Earth .
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Acasta Gneiss Radiometric Dating