Please Help me find the right answers Sedimentary rocks that originated as depos
ID: 110224 • Letter: P
Question
Please Help me find the right answers
Sedimentary rocks that originated as deposits near the center of a large lake should have: a. graded bedding b. cross bedding c parallel bedding d. oblique bedding The pattern of magnetic anomalies across mid-oceanic ridges can be described as: a. random b. asymmetric alternating crustal bands of similar polarity c. symmetric alternating bands of similar polarity d. opposite polarity on opposite sides of the ridge The rate of cooling of an igneous rock can be determined by the: a. silica content b. color c. quartz content d. texture In comparison to an ocean basin, the crustal root of a mountain range is a. deep and of lower density than the surrounding rocks b. deep and very dense c. shallow and very dense d. shallow and of lower density than the surrounding rocks According to current estimates, the earth's internal temperature is a. at the melting point in the outer core b. above the melting point in the outer core c. below the melting point in the outer core d. lower in the outer core than in the mantle Quartz and feldspar are members of the: a. framework silicates b. sheet silicates c. single-chain silicates d. double-chain silicates The chemical composition of a magma is most likely indicated by: a. the color of the resulting rock b. the texture of the resulting rock c. the specific gravity of the resulting rock d. none of the aboveExplanation / Answer
21)a.gradded bedding
Gradded bedding is a sort of particles according to clast size shape on a lithified horizontal plane.
23)d.texture
The texture of the igneous rock depend on rate of cooling.slow cooling sllows large crystals to form and fast cooling yields smaller crystals
26)a.framework silicates
It is also called as tectosilicates.It will have the three dimension framework of silicate tetrahedra with 1:2 ratio.This is largest mineral group comprising nearly 75 percent of earth's crust