The following observations were made in a stack of 11 meters thick: * In the limestones of 5 meters thickness forming the lowest part of the sequence, I and II numbered foraminifers were observed. * No fossils were observed at the following 4-meter sandstone level. * III numbered bivalves were observed in the 2-meter mudstones forming the top part of the sequence. In the light of these data, answer the questions below. a) How has the depositional environment of this sequence changed over time? Explain. b) What could be the reason for not observing foraminifera I and II at the sandstone level? Explain.
The following observations were made in a stack of 11 meters thick: * In the limestones of 5 meters thickness forming the lowest part of the sequence, I and II numbered foraminifers were observed. * No fossils were observed at the following 4-meter sandstone level. * III numbered bivalves were observed in the 2-meter mudstones forming the top part of the sequence. In the light of these data, answer the questions below. a) How has the depositional environment of this sequence changed over time? Explain. b) What could be the reason for not observing foraminifera I and II at the sandstone level? Explain.
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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The following observations were made in a stack of 11 meters thick:
* In the limestones of 5 meters thickness forming the lowest part of the sequence, I and II numbered foraminifers were observed.
* No fossils were observed at the following 4-meter sandstone level.
* III numbered bivalves were observed in the 2-meter mudstones forming the top part of the sequence.
In the light of these data, answer the questions below.
a) How has the depositional environment of this sequence changed over time? Explain.
b) What could be the reason for not observing foraminifera I and II at the sandstone level? Explain.
Transcribed Image Text:II
II
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