Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN: 9780134746241
Author: Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher: PEARSON
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Question
Questions:
A. For each drilling location marked by o on the map, what is the distance from the spreading
ridge and age of the oceanic crust. Describe how you determined these values and show any
calculations.
B. Draw the down-core sedimentary record you would expect to find if you sampled at each of
four drilling locations marked by an o on the map. The sediment record should be divided into
sediment units based upon the composition/mixture of sediment types accumulating. When A
change in the composition of accumulating sediments will mark a division between units. Keep
in mind that if several different sediment types are accummulating at one time, their
accumulation is continuous and you will have a mixture given by their fluxes.
For each site,
(i)
(ii)
(iii)
(iv)
draw the column of sedimentary units that accumulated,
number the sediment units from oldest to youngest as Unit 1, Unit 2, etc. (The
drawing for each site should be a series of stacked units.)
label the age of the oceanic crust.
For each unit at each site, what is the sediment type, sediment composition/mixture,
thickness of the unit, ages and depths for the bottom and top of the unit?
C. Explain the sedimentary sequences you have drawn in terms of plate tectonic, isostacy, and
sedimentological processes.
D. For which time periods could you study opal productivity with the four sites that you have
drilled? (You would need opal sediments from that time period to study.)
E. If you wanted a continuous sedimentary record covering the last 100 My of equatorial
biogenic opal sediments, would I need to move my drill sites or add more sites? If so, what
would my new drilling strategy be? Describe how you determined your answer and show any
calculations you may have used. (Note, the sediments don't have to all be from the same drill
core for this study.)
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Transcribed Image Text:Questions: A. For each drilling location marked by o on the map, what is the distance from the spreading ridge and age of the oceanic crust. Describe how you determined these values and show any calculations. B. Draw the down-core sedimentary record you would expect to find if you sampled at each of four drilling locations marked by an o on the map. The sediment record should be divided into sediment units based upon the composition/mixture of sediment types accumulating. When A change in the composition of accumulating sediments will mark a division between units. Keep in mind that if several different sediment types are accummulating at one time, their accumulation is continuous and you will have a mixture given by their fluxes. For each site, (i) (ii) (iii) (iv) draw the column of sedimentary units that accumulated, number the sediment units from oldest to youngest as Unit 1, Unit 2, etc. (The drawing for each site should be a series of stacked units.) label the age of the oceanic crust. For each unit at each site, what is the sediment type, sediment composition/mixture, thickness of the unit, ages and depths for the bottom and top of the unit? C. Explain the sedimentary sequences you have drawn in terms of plate tectonic, isostacy, and sedimentological processes. D. For which time periods could you study opal productivity with the four sites that you have drilled? (You would need opal sediments from that time period to study.) E. If you wanted a continuous sedimentary record covering the last 100 My of equatorial biogenic opal sediments, would I need to move my drill sites or add more sites? If so, what would my new drilling strategy be? Describe how you determined your answer and show any calculations you may have used. (Note, the sediments don't have to all be from the same drill core for this study.)
Equatorial High
Opal Productivity
CCD
ridge
Four drill sites
C
CCD
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Transcribed Image Text:Equatorial High Opal Productivity CCD ridge Four drill sites C CCD
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