Foliation is much better developed in most schists and gneiss than in most quartzites and marbles.
The major contrast between schist and gneiss is that schist is made of mudstone or shale, whereas gneiss is made of micas, chlorite, or other platy minerals. While Marble and quartzite the major difference is that marble is composed of calcite whereas quartzite is composed of quartz.
Schist is identified by its flat and large sheet-like grains it also has flat and elongated minerals such as talc or micas. Gneiss is a metamorphic rock formed by changing schist, granite, or volcanic rocks through intense heat and pressure. Gneiss is foliated, which means that it has layers of lighter and darker minerals.
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I think the answer to this is structure C
Numerous scientific and technological advances were accomplished by the Ancient Greeks. Greek philosophers started to adopt new perspectives on the world. They developed hypotheses about how the universe operated and believed that the natural world adhered to a set of rules that could be observed and understood via research.
Pythagoras studied geometry. Pythagoras kept track of all the mathematical advancements that were accomplished in Greece over time. To determine the sides of a right triangle, he established the Pythagorean Theorem, which is still in use today.
Euclid was arguably the most significant Greek mathematician. Numerous works titled Elements were written by Euclid on the subject of geometry. For 2000 years, these texts served as the de facto reference on the subject. Sometimes referred to as the most influential textbook in history, Euclid's Elements.
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The vasa vasorum is a network of small blood vessels that supply the walls of large blood vessels, such as the aorta and vena cava.
