1.2.2 Previous work on the anorthosites of the Kunene Intrusive Complex. 29 Thin section microphotographs of the (a-c) white anorthosite suite and (d) dark

Anorthosite: Anorthosite: A leucocratic coarse-grained plutonic rock consisting essentially of plagioclase (usually labradorite or bytownite) often with small amounts

So, take a look at the thin section pictures for the three lunar basalts below, and give these three rocks textural names! Lunar Basalt 12002, Apollo 12. Lunar Basalt 12005, Apollo 12. Lunar Basalt 70017, Apollo 17.

Lunar Basalt 70017, Apollo 17. Question 2: Intersertal and Intergranular textures occur on the Earth in Mid Ocean Ridge Basalts, which are erupted on the bottom of the sea Rocks under the Microscope. Some common rock types as seen under the microscope. These are photomicrographs - very thin slices of rock, seen in plane-polarised light, or between crossed polarisers, when the colours seen are produced by interference of light. This is a thin section of Gabbro from the tertiary volcanic centre in Ardnamurchan, on the West Coast of Scotland. Famous for its complete ring dyke made of Eucrite, a similar gabbro.

IGSN, Sample Type, Notes, Location, Number Thin Sections, Storage Location. GRD02YCS0, Microcline, Microcline var. Amazonite, Colorado, 0, Ritter 154,

Andesite is an extrusive igneous rock that is higher in silica than basalt and lower than … 2013-04-23 Anorthosite plutons occur in a wide range of sizes. Some smaller plutons, exemplified by many anorthosite bodies in the U.S. and Harris in Scotland, cover only a few dozen square kilometres.

In optical mineralogy and petrography, a thin section is a laboratory preparation of a rock, mineral, soil, pottery, bones, or even metal sample for use with a polarizing petrographic microscope, electron microscope and electron microprobe. A thin sliver of rock is cut from the sample with a diamond saw and ground optically flat. It is then mounted on a glass slide and then ground smooth using progressively finer abrasive grit until the sample is only 30 μm thick. The method uses the Michel

6. BRECCIA volcanic light grey CO. 7.

anorthosite, gabbroic anorthosites, anorthositic gabbro, gabbros and ultramafic rock, is observed only at a few places of limited extent. English: Anorthosite, with skeletal crystal of magnetite, cross polarized light. From the Bushveld Igneous Complex.
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Modal analyses of thin-sections have been carried out on 51 rock samples from outcrops and on 5 rock samples from the drillcore in borehole KLX0 .

A coarse grained igneous rock, anorthosite is characterized by being … Proterozoic anorthosite Age. Proterozoic anorthosites were emplaced during the Proterozoic Eon (ca. 2,500–542 Ma).. Mode of occurrence. Anorthosite plutons occur in a wide range of sizes.
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BRECCIA sedimentary CA. 9. BRECCIA andesite grey CO. 10.

Rocks under the Microscope. Some common rock types as seen under the microscope. These are photomicrographs - very thin slices of rock, seen in plane-polarised light, or between crossed polarisers, when the colours seen are produced by interference of light.

1.76. 1.67. 1.65. The main p a r t o f t h e work i s concentrated on d i f f e r e n t probe methods.

Olivine, amphibole, ilmenite, magnetite, and spinel are also sometimes present. The term anorthosite, from Frenc anorthose (term for plagioclase) was coined by Sterry Hunt. Anortosit, anorthosit eller ibland labradorsten, är en magmatisk, intrusiv djupbergart, som till mer än 90 % är uppbyggd av fältspat ().Också pyroxen samt mindre mängder av oxider som magnetit, ilmenit och olivin förekommer.