Sentences with phrase «for igneous rocks»

Basalt magmas form by decompression melting of peridotite in the Earth's mantle, a process discussed in the entry for igneous rocks.

Not exact matches

For example, igneous rock's «clocks», for some isotopes, are reset when they are meltFor example, igneous rock's «clocks», for some isotopes, are reset when they are meltfor some isotopes, are reset when they are melted.
The study by Andersen and his colleagues is the first to use the uranium isotope ratio for the examination of igneous rock and apply it to the recycling process in deep Earth.
Rietveld and full - pattern analysis of the XRD data have revealed a complex mineralogy, with contributions from parent igneous rocks, amorphous components and several minerals relating to aqueous alteration, for example clay minerals and hydrated sulphates.
Because we can not sample the deep Earth, we must deduce its composition either by looking at the clues hidden in igneous and metamorphic rocks, or by examining proxies for composition and structure such as the three - dimensional variation of the velocity of seismic waves produced by earthquakes and sampled by networks of seismometers on the surface.
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Virtual Dating Isochron for rocks and minerals; Virtual Dating Radiocarbon (Carbon Interweaving the relative time scale with the atomic time scale poses certain problems because only certain types of rocks, chiefly the igneous variety
it ideal for dating much older rocks and A commonly used radiometric dating technique relies on the breakdown of potassium (40 K) to argon If an igneous or other rock is metamorphosed,
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The lesson includes a practical link to the formation of igneous rocks with the opportunities for pupils to write their own hypothesis and conclusion for the experiment.
Contents - 16 X Key Vocab Cards - Display Title - 2 X Blank Cards (for the children to create their own) Vocabulary Included - Metamorphic Rock - Igneous Rock - Sedimentary Rock - Weathering - Deposition - Rock Cycle - Sediment - Rock - Magma - Lava - Extrusive Rocks - Intrusive Rocks - Acid Rain - Fossils - Earth's Crust - Earth's Mantle ----------------------------------- Enjoy!
In one 1st grade class at Center City's Brightwood campus, for example, the teacher held 25 children rapt as she animatedly read to them about igneous rock.
Ironically for our green friends, the ore comes from a type of rock called «carbonatite» which is a relatively rare and unusual type of igneous rock composed primarily of carbonate minerals.
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