Relative+Dating+Activity+Sp21

Plenge S21 Relative Dating Activity Your name Poojha Palle Group # 2 ---------------------------------------------------------------------------------------------------------------------------------------------------------------- Use this diagram for the questions 1-4. Note that “B” and “E” are faults. Other layers are sedimentary. 1. Which answer choice correctly identifies a visible unconformity in this diagram? a. Contact between layers H and D b. Contact between layers C and A c. Contact between layers F and A d. Contact between layers F and H 2. Which layers or faults are OLDER than fault B? a. G, C, and A c. G, C, A, and F b. Layer F only d. All layers shown 3. Which answer choice correctly compares the ages of fault E and fault B? a. Fault B broke and shifted rocks before fault E b. Fault B broke and shifted rocks after fault E c. Fault B broke and shifted rocks as the same time as fault E did d. The order of events cannot be discerned from this information alone 4. List layers/faults in order from oldest to most recent: G, C, A, F, B, H, D, I, E. ---------------------------------------------------------------------------------------------------------------------------------------------------------------- Use this diagram for 5-8. “F” & “L” are igneous intrusions; “G” is a fault. 5. Which is older: a. Intrusion F b. Fault G 6. Where in this picture would metamorphic rocks be found? a. Where H & I meet b. Where F & (A, B, C, & D) meet c. Where H & (C, D, & E) meet 7. Layer “C” is shale (which often forms in deep marine environments) layer “D” is limestone (often forms in shallow marine environments) and layer “E” is sandstone (often formed in coastal environments). Which choice best describes how this area changed while these layers were being deposited? a. Sea level was rising over that period of time b. Sea level was falling over that period of time 8. Intrusion F has been radiometrically dated and is around 750 million years old. What does this tell you about the when the deep ocean that produced layer “C” existed? a. A deep ocean existed here MUCH earlier than 750 million years ago b. A deep ocean existed here approximately 750 million years ago c. A deep ocean existed here MUCH later than 750 million years ago