Measuring Sea level

Question 1

Fractionation occurs when:

Answer 1

-Lighter H20 ^16 is evaporated
-Heavier H20 ^18 is initially “ rained out”

Question 2

Fractionation

Answer 2

unequal separation

Question 3

Space for sed. Deposition controlled by:

Answer 3

-Relative sea level/ accommodation space
-Sediment supply

Question 4

Onlap

Answer 4

Reflector terminating on an inclined surface

Question 5

Downlap

Answer 5

Reflector terminating downward onto a surface

Question 6

Toplap

Answer 6

Reflector terminating upward at a surface

Question 7

Unconformity

Answer 7

Reflector has been cut into by subaerial erosion

Question 8

Lowstand

Answer 8

-Fanformed
-Wedge formed
-Submarine fan shaped

Question 9

Transgressive

Answer 9

Rapid Movement Across shelf

Question 10

Highstand

Answer 10

Progradation (Marine Flooding surface)

Question 11

Forced Regressive

Answer 11

Younger strata onlap lower across shelf/slope and downlap seaward

Question 12

How to measure sea level

Answer 12

-Satellites
-Tide Stations

Question 13

How to Measure sea level (Narrow level)

Answer 13

-Salt marsh sediments
-Mangroves
-Stromatolites
-Intertidal forams
-Coral reefs