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Questions and Answers
What is the basic unit of lithostratigraphic units?
What is the basic unit of lithostratigraphic units?
- Member
- Formation (correct)
- Supergroup
- Bed
Which lithostratigraphic unit is a subunit of a formation?
Which lithostratigraphic unit is a subunit of a formation?
- Supergroup
- Group
- Member (correct)
- Bed
What is the distinctive layer 1cm – 2m thick that is distinguishable from layers above & below called?
What is the distinctive layer 1cm – 2m thick that is distinguishable from layers above & below called?
- Supergroup
- Group
- Formation
- Bed (correct)
What type of unit is described as two or more formations with significant features in common?
What type of unit is described as two or more formations with significant features in common?
What is a section that represents an actual column of rock drawn to show rock type, thickness, deformation, inclusions, and used for correlation across geographic areas called?
What is a section that represents an actual column of rock drawn to show rock type, thickness, deformation, inclusions, and used for correlation across geographic areas called?
Subsurface geology only involves the study of geological features found on the surface of the Earth.
Subsurface geology only involves the study of geological features found on the surface of the Earth.
The subsurface geologist is concerned with the distribution, thickness, character, attitude, depths, sequence, correlation, fossil content, and geologic age of the subsurface rock layers.
The subsurface geologist is concerned with the distribution, thickness, character, attitude, depths, sequence, correlation, fossil content, and geologic age of the subsurface rock layers.
The regional stratigraphic section is where formations are measured, described, and named from subsurface observations.
The regional stratigraphic section is where formations are measured, described, and named from subsurface observations.
The structural geology at the surface is of little importance to the three-dimensional interpretation.
The structural geology at the surface is of little importance to the three-dimensional interpretation.
Geophysical surveys have yielded only indefinite indications of subsurface structural conditions during the reconnaissance phase.
Geophysical surveys have yielded only indefinite indications of subsurface structural conditions during the reconnaissance phase.
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Study Notes
Lithostratigraphic Units
- The basic unit of lithostratigraphic units is the Bed.
- A Member is a lithostratigraphic unit that is a subunit of a Formation.
Lithostratigraphic Features
- A distinctive layer 1cm – 2m thick that is distinguishable from layers above and below is called a Bed.
Groups and Formations
- A Group is a type of unit that is described as two or more Formations with significant features in common.
Geological Sections
- A section that represents an actual column of rock drawn to show rock type, thickness, deformation, inclusions, and used for correlation across geographic areas is called a Measured Section.
Subsurface Geology
- Subsurface geology involves the study of geological features below the surface of the Earth, including the distribution, thickness, character, attitude, depths, sequence, correlation, fossil content, and geologic age of subsurface rock layers.
Regional Stratigraphic Section
- Formations are measured, described, and named from subsurface observations in a Regional Stratigraphic Section.
Importance of Surface and Subsurface Geology
- The structural geology at the surface is important for three-dimensional interpretation.
Geophysical Surveys
- Geophysical surveys can provide indications of subsurface structural conditions during the reconnaissance phase.
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