need help answering these questions thanks! Sbhitle Subtle Em... Emphasis graph

Question

need help answering these questions thanks!

Sbhitle Subtle Em... Emphasis graph Styles 014 Which sediment is the most compositionally mature? feldspar, quartz, biotite mica sand feldspar, quartz, homblende sand quartz, feldspar, olivine sand quartz sand C C 017 What two textural changes commonly accompany metamorphism? mineral coarsening, foliation smaller minerals, non foliation mineral coarsening, crystalline foliation, schistose 434 What role do gases play in volcanism? forms fissures only Cmakes for mild eruption deives volcanic eruption 037 Three special circumstances must occur for fossil preservation Depth in Anoxic environment, rapid burial, presence of hard body parts burial at sea, presence of decomsposing bacteria, peesence of hard body parts rapid burial in landslide, few scavengers, presence of hard body parts C large macrofossals, presence of hard body parts, interaal skeletons 043 viscosity of lava? r sileca and feldspar content gax content and feldspar conteat

Explanation / Answer

14. Quartz sand.

Explanation : Sediments that contain stable minerals that are also mature like quartz are the sediments that are most matured compositionally. Compositional maturity of a sediment is mainly determined by the quartz:feldspar ratio and if the sediments is entirely composed of quartz, we get the ration of quartz : feldspar as 1 which means it is the most matured of all.

17. Foliation, schistose.

Explanation : Foliation is a general term for the linear arrangement of the textural features in a metamorphic rock. Schistosity is the term applied to a type of foliation that is a characteristic of the coarse grained metamorphic rocks and is defined by the parallel allignment of platy minerals like the micas.

34. Drives volcanic eruption.

Explanation : Gases give magma their explosive character which in turn drives the volcanic eruptions.

37. Depth in anoxic environment, rapid burial, presence of hard body parts.

Explanation : Anoxic environment will prevent the oxidation of the fossil parts, rapid burial without much transportation will help in keeping the fossil intact without much damage and the hard body parts can survive stress and abrasions, so their chances of being fossilized are on the greater side.

43. Silica and feldspar content.

Explanation : The viscosity of a magma is directly proportional to the silica percentage of the magma. Greater the silica percentage, greater is the viscosity of the magma. Because feldspar is also a silicate mineral, it further adds to the percentage of silica in a magma.

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.