Can carbon 14 be used for dating lava flows explain

08-Aug-2017 05:16

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The mineralogy of basalt is characterized by a preponderance of calcic plagioclase feldspar and pyroxene. Accessory minerals present in relatively minor amounts include iron oxides and iron-titanium oxides, such as magnetite, ulvospinel, and ilmenite.Because of the presence of such oxide minerals, basalt can acquire strong magnetic signatures as it cools, and paleomagnetic studies have made extensive use of basalt.In particular, the relative abundance of europium compared to the other REE is often markedly higher or lower, and called the europium anomaly.It arises because Eu in plagioclase feldspar, unlike any of the other lanthanides, which tend to only form 3 cations.The groundmass contains interstitial quartz or tridymite or cristobalite.Olivine tholeiitic basalt has augite and orthopyroxene or pigeonite with abundant olivine, but olivine may have rims of pyroxene and is unlikely to be present in the a common extrusive igneous (volcanic) rock formed from the rapid cooling of basaltic lava exposed at or very near the surface of a planet or moon.Flood basalt describes the formation in a series of lava basalt flows.

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It is the most common volcanic rock type on Earth, being a key component of oceanic crust as well as the principal volcanic rock in many mid-oceanic islands, including Iceland, the Faroe Islands, Réunion and the islands of Hawaii.Basalt with a vesicular texture is called vesicular basalt, when the bulk of the rock is mostly solid; when the vesicles are over half the volume of a specimen, it is called scoria.

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