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 above