[Prize-winning Quiz on Oil Production Geology] 2

Thread Content

6. Which of the following is not a type of contact between strata or rocks? ( ) contact. (A) Conformity (B) Disconformity (C) Angular unconformity (D) Sedimentation. 7. In cases of conformable contact between strata, their stratigraphic positions are consistent; their rock properties and biological evolution show continuity and gradual change, and in terms of sedimentation ( ). (A) There is crustal movement. (B) There is no sedimentation. (C) There are interruptions. (D) There are no interruptions. 8. In stratigraphic sedimentation, ( ) indicates that the stratum was formed in a sedimentation environment where the crust was in a state of continuous descent or continuous ascent. (A) Integration (B) Parasequence (C) Unconformity (D) Parallel unconformity. 9. When the orientations of the new and old strata are the same, and there are changes in the rock properties and paleontological evolution as well as in sedimentation processes, there is an erosion surface at the contact zone; when this erosion surface is parallel to the contacts with the strata above and below it, such a contact is considered a parasequence contact. (A) Continuous (B) Discontinuous (C) Uneroded (D) Continuously rising 10. An unconformity indicates that after the formation of the older strata, the crust rose significantly to a state of equilibrium; the older strata were eroded, after which the crust dropped back to equilibrium, and deposition occurred on the eroded surface to form the ( ) strata. (A) Old (B) New (C) Thick (D) Thin Last edited by No. 18 on 2009-4-17 09:06]