An unconformity is a buried fault or fracture with older rocks above and younger

Question

An unconformity is a buried fault or fracture with older rocks above and younger rocks below surface of erosion with older strata above and younger strata below fault or fracture with younger strata above and older strata below surface of erosion separating younger strata above from older strata below Which of the following best characterizes an angular unconformity? Tilted strata lie below the unconformity; bedding in younger strata above is parallel to the unconformity. The discordant boundary between older strata and an intrusive body of granite. Horizontal lava flows lie below the unconformity and horizontal, sedimentary strata lie above Tilted strata lie below the unconformity with loose, unconsolidated soil above. Which of the following is not a very long-lived, radioactive isotope? U-238 Rb-87 K-40 C-14 The subdivision of the geologic time scale that represents the longest time span is called a(n) eon epoch era period The ratio of parent to daughter isotopes in a radioactive decay process is 0.40. How many half-lives have elapsed since the material was 100% parent atoms? more than 3 between 1 and 2 between 2 and 3 less than 1 Which of the following geologic observations would not bear directly on working out the sequence of geologic events in an area? inclusions of sandstone in a granite pluton an unconformity between a granite and sandstone a well-exposed dike of basalt in sandstone the feldspar and quartz contents of a granite What fundamental concept states that in a horizontal sequence of conformable sedimentary strata, each higher bed is younger than the bed below it? law of original correlation law of superposition theory of correlative deposition theory of superstition By applying the law of superposition dates can be determined. conventional radiometric both relative and radiometric relative About 88 percent of geologic time is represented by the time span called the Mesozoic Phanerozoic Paleozoic Precambrian The half-life of carbon-14 is about 6000 years. Assume that a sample of charcoal formed by burning of living wood 15,000 years ago. How much of the original carbon-14 would remain today? between one-fourth and one-eighth more than one-half between one-half and one-fourth between one-half and one-third Visualize five horizontal sedimentary strata exposed in a diff or canyon wall identified by consecutive numbers, 1 being the lowest bed and 5 being the highest. Which of the following statements concerning the strata are true? Bed 4 is Older than bed 2. Beds 1 and 3 are older than bed 4. Bed 5 is the oldest. Bed 3

Explanation / Answer

Question 14

Answer: D) surface of erosion separating younger strata above from older strata below.

Unconformity may be defined as an old erosion surface which separates younger series of rocks from the older series. Here younger above unconformity and older below ( unless sequence has been overturned)

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

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