Using the image provided of shield volcanoes on Venus, determine the relative ag
ID: 292324 • Letter: U
Question
Using the image provided of shield volcanoes on Venus, determine the relative age (from oldest to youngest) of the following features using principles of superposition and cross-cutting relationships. Recall that you may not be able to determine relative ages for all the features, for some you may not be able to tell which is older or younger. Answers are given in the following form: Oldest A) Shield Volcano #1 B) Shield Volcano #2 C) "streaks" which are Fractures or faults (goes through the Volcano#1) D) Basin Youngest vanus shield volcanges JPG A.Oldest A>B C& D Youngest; Can't tell relative age between C and D Cldest CD>A>B Youngest COldest A B C D Youngest DOldest DA C&B; Youngest: Can't tell reletive age between C and B E, Oldest D > A > C >B YoungestExplanation / Answer
Answer : D. Oldest D>A>C&B Youngest. Can't tell relative age between C and B.
Explanation : D or the basin is the oldest of all because all the other features are located atop or superposed upon the basin so it forms a kind of basement here and according to the principal of superposition, in any undeformed sequence of strata, the oldest layers occur at the bottom with successively younger layers above it. Here, D occurs at the bottom of the sequence indicating that it is the oldest in the sequence. Next the streaks(of fractures or faults) C cuts across the Shield volcano A which from the principal of cross cutting relationship means that the streaks C are younger than the Volcano A. From the figure it can be inferred that a portion of the shield volcano B is superimposed upon the Volcano A which means a part of B sits atop A indicating it is younger than A. But since there is no clear relationship between B and C we can't determine their relative ages.
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.