For "J" what type of general rock is it? - Sedimentary, igneous, metamorphic?- Specific rock name? **Geological Cross-Section Diagram Explanation**This is a cross-section diagram illustrating various geological units and structures, typically used to understand the subsurface geology of an area. The diagram extends horizontally from the west (left) to the east (right) over a distance scale of 800 meters, with each grid unit on the horizontal scale representing 200 meters.### Diagram Key and Features:1. **Stratigraphic Units**: - Different rock layers are labeled from A to J, indicating various stratigraphic units. Each labeled layer represents different types of rocks or sedimentary deposits.2. **Contact Metamorphism**: - Represented by a series of **dotted lines**, which mark zones where existing rocks have been altered by heat, typically due to intrusion of molten rock material. - Notable contacts are visible around units A and B, in particular.3. **Unconformity**: - Illustrated by **wavy lines**, these lines suggest gaps in the geological record, where rock layers were eroded or never deposited. There are significant unconformities labeled with arrows pointing to feature K within the diagram.4. **Marker Bed in Unit I**: - Shown by a **dash-dotted line** labeled `L`, used as a reference point across the cross-section. It extends through units E, F, and I, indicating a continuous layer that can be correlated across the section.### Notable Features:- **Intrusions and Faults**: - Thick solid lines running vertically and slanting, such as the one labeled with arrows pointing to features such as H, represent faults or intrusive bodies that disrupt the continuity of rock layers.- **Deformation Structures**: - Some zones display folding or warping, especially noticeable in Units A, B, C, and D.### Measurements and Scale:- **Horizontal Scale**: - The horizontal extent of the diagram is 800 meters, indicated with markers every 200 meters.- **Vertical Scale**: - The vertical direction remains unspecified numerically but is consistent for the relative comparison of unit thicknesses and depths.This cross-section provides a visual representation crucial for understanding the geological history and structural complexities of the Earth's subsurface in the depicted region.

Answered: For "J" what type of general rock is…

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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For "J" what type of general rock is it? - Sedimentary, igneous, metamorphic?

- Specific rock name?

**Geological Cross-Section Diagram Explanation**

This is a cross-section diagram illustrating various geological units and structures, typically used to understand the subsurface geology of an area. The diagram extends horizontally from the west (left) to the east (right) over a distance scale of 800 meters, with each grid unit on the horizontal scale representing 200 meters.

### Diagram Key and Features:

1. **Stratigraphic Units**:
- Different rock layers are labeled from A to J, indicating various stratigraphic units. Each labeled layer represents different types of rocks or sedimentary deposits.

2. **Contact Metamorphism**:
- Represented by a series of **dotted lines**, which mark zones where existing rocks have been altered by heat, typically due to intrusion of molten rock material.
- Notable contacts are visible around units A and B, in particular.

3. **Unconformity**:
- Illustrated by **wavy lines**, these lines suggest gaps in the geological record, where rock layers were eroded or never deposited. There are significant unconformities labeled with arrows pointing to feature K within the diagram.

4. **Marker Bed in Unit I**:
- Shown by a **dash-dotted line** labeled `L`, used as a reference point across the cross-section. It extends through units E, F, and I, indicating a continuous layer that can be correlated across the section.

### Notable Features:

- **Intrusions and Faults**:
- Thick solid lines running vertically and slanting, such as the one labeled with arrows pointing to features such as H, represent faults or intrusive bodies that disrupt the continuity of rock layers.

- **Deformation Structures**:
- Some zones display folding or warping, especially noticeable in Units A, B, C, and D.

### Measurements and Scale:
- **Horizontal Scale**:
- The horizontal extent of the diagram is 800 meters, indicated with markers every 200 meters.
- **Vertical Scale**:
- The vertical direction remains unspecified numerically but is consistent for the relative comparison of unit thicknesses and depths.

This cross-section provides a visual representation crucial for understanding the geological history and structural complexities of the Earth's subsurface in the depicted region.

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