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cumulate
▪ I. cumulate, a. (ˈkjuːmjʊlət) [ad. L. cumulāt-us, pa. pple. of cumulāre: see next.] Formed or gathered into a heap; heaped up; massed.1535 Stewart Cron. Scot. I. 118 Ane carne of stonis togither cumulat. 1633 T. Adams Exp. 2 Peter i. 2 A cumulate or heaped fulness, when it overflows the continent....
Oxford English Dictionary
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Cumulate rock
Cumulate rocks are typically named according to the cumulate minerals in order of abundance, and then cumulate type (adcumulate, mesocumulate, orthocumulate Cumulate terminology is appropriate for use when describing cumulate rocks.
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cumulately
cumulately, adv. (ˈkjuːmjʊlətlɪ) [f. cumulate a.] In a cumulate manner, by cumulation.1846 Dana Zooph. (1848) 637 The stems lengthen cumulately by gemmation.
Oxford English Dictionary
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Chassigny (meteorite)
Chassigny is an olivine cumulate rock (dunite). It consists almost entirely of olivine with intercumulus pyroxene, feldspar, and oxides. These differences are presumably due to its cumulate (mantle-derived) nature.
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cumulatist
cumulatist rare. (ˈkjuːmjʊlətɪst) [f. cumulate v. + -ist.] One who accumulates.a 1846 Christian Observer cited in Worcester.
Oxford English Dictionary
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Dunite
These "cumulate" dunites typically occur in thick layers in layered intrusions, associated with cumulate layers of wehrlite, olivine pyroxenite, harzburgite , and even chromitite (a cumulate rock consisting largely of chromite).
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cumulato-
cumulato- (kjuːmjuːˈleɪtəʊ-) combining form from L. cumulātus cumulate, in sense ‘cumulately-’, ‘cumulate and―’, as in, e.g., cumulato-fasciculate, bunched or fasciculate, with aggregation of the fascicles.1846 Dana Zooph. (1848) 383 Cumulato-fasciculate, polyps long turbinate. Ibid. Gloss., Cumulat...
Oxford English Dictionary
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Laurite
It occurs in ultramafic magmatic cumulate deposits and sedimentary placer deposits derived from them.
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Wehrlite
Another occurrence is as cumulate in gabbro and norite layered intrusions. Some meteorites can also be classified as wehrlites (e.g. NWA 4797).
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Eucrite
Nuevo Laredo trend eucrites are thought to come from deeper layers of 4 Vesta's crust, and are a transition group towards the cumulate eucrites. Cumulate eucrites are rare types with oriented crystals, thought to have solidified in magma chambers deep within 4 Vesta's crust.
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Why is P{$\cup_{k=2,4,6,...even}[\frac{1}{2^k},\frac{1}{2^k}+\frac{1}{2^{k+1}}]$}=$\sum_{k=2,4,6,..even}\frac{1}{2^{k+1}}$ Question: Given the uniform pdf on $[0,1]$,$f(x)=1$; x $\in [0,1] $.Define the cumulate distri...
For uniform distribution on $[0,1]$ we have $P([a,b])=b-a$ whenever $0\leq a\leq b \leq1$. Just apply this to $a=\frac 1 {2^{k}}$ and $b=\frac 1 {2^{k}}+\frac 1 {2^{k+1}}$. [The intervals are disjoint when $k$ is restricted to even integers].
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Chromitite
Chromitite is an igneous cumulate rock composed mostly of the mineral chromite.
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Layered intrusion
Often, cumulate layers are polyminerallic, forming gabbro, norite and other rock types. Monomineralic cumulate layers are common.
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Troctolite 76535
Geologists have described it as a coarse-grained olivine-plagioclase cumulate with a granular polygonal texture. the rock formed at a depth of 47 kilometers, about the middle to lower crust of the Moon, Investigations have shown that the rock may have formed as a cumulate
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Flow banding
See also
Cumulate rock
Igneous differentiation
References
Igneous rocks
Structural geology
Volcanology
Igneous petrology
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