Midland Valley

Created by: Supakicka1
Created on: 08-12-18 16:33

1. What and where is the source of Lower Old Red Sandstone conglomerates in the North Midland Valley (i.e. south of HBF in the Highland Border Basin)?

Mainly volcanic clasts derived from an arc to the SE. Conglomerate fines to NW (2 marks)

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2. Which side of the Highland Boundary Fault was downthrown and when did major activity cease?

To the South until the end of the Middle Devonian (2 marks)

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3. What are the main rock types in the Ballantrae Complex?

Ophiolite sequence that contains serpentinite, gabbro, pillow lavas, cherts and black shales (2 marks)

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4. In the Ordovician, Silurian and Devonian sequence of the southern margin of the Midland Valley, which parts were deposited in a marine, and which in a terrestrial environment?

Ordovician – marine, Silurian – marine, possibly terrestrial by Late Wenlock, Devonian – terrestrial (2 marks)

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5. What are the basement rocks beneath the Midland Valley and what is their age?

Mafic and felsic granulites 1.2 Ga (2 marks)

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Other cards in this set

Card 2

Front

2. Which side of the Highland Boundary Fault was downthrown and when did major activity cease?

Back

To the South until the end of the Middle Devonian (2 marks)

Card 3

Front

3. What are the main rock types in the Ballantrae Complex?

Back

Card 4

Front

4. In the Ordovician, Silurian and Devonian sequence of the southern margin of the Midland Valley, which parts were deposited in a marine, and which in a terrestrial environment?

Back

Card 5

Front

5. What are the basement rocks beneath the Midland Valley and what is their age?

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Midland Valley