Arbuthnott-Garvock Group facts for kids
Quick facts for kids Arbuthnott-Garvock GroupStratigraphic range: ?Lochkovian-Pragian, (Devonian) |
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|---|---|
| Type | Group |
| Unit of | Old Red Sandstone Supergroup |
| Sub-units | Catterline Conglomerate, Scone Sandstone, Craighall Conglomerate, Ruchil Flagstone and Craig of Monievreckie Conglomerate formations |
| Underlies | Cromlix Mudstone Formation of Strathmore Group |
| Overlies | Crawton Volcanic Formation and other units |
| Thickness | 2400 - 3150m |
| Lithology | |
| Primary | sandstone |
| Other | mudstone, siltstone, conglomerate |
| Location | |
| Region | Argyll, Fife, Angus, Aberdeenshire |
| Country | Scotland |
| Extent | along northern margin of Central Lowlands, south of Highland Boundary Fault from Kintyre to Aberdeenshire |
| Type section | |
| Named for | Arbuthnott and Hill of Garvock near Laurencekirk, both in Aberdeenshire |
The Arbuthnott-Garvock Group is a collection of ancient rocks found in central Scotland. These rocks formed a very long time ago, during a period called the Devonian Period. This group is named after the village of Arbuthnott and the Hill of Garvock, both located near Laurencekirk in Aberdeenshire. It helps scientists understand the Earth's history in this region.
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Where to Find These Rocks
These rocks are found in several places across Scotland. In the west, you can see them in southern Kintyre, between Campbeltown and Southend. They also appear on the Isle of Arran, forming a curved shape between Machrie and Sannox.
Along the Highland Boundary Fault
A long strip of these rocks runs parallel to the Highland Boundary Fault. This fault is a major crack in the Earth's crust. This strip stretches from Helensburgh to Blairgowrie. It passes through places like Aberfoyle and Callander. It reaches as far as the southern edge of Stonehaven on Scotland's east coast.
East Coast and Central Scotland
A large area in the east, between Stonehaven and Dundee, is made up of these rocks. This includes the areas around Brechin, Forfar, and Arbroath. Another belt of these rocks extends from Forfar to Dunblane, passing through Perth and into northern Fife.
What Are These Rocks Made Of?
The Arbuthnott-Garvock Group is made up of many different types of rock layers. Scientists call these layers "formations." Some of the formations in this group include:
- Catterline Conglomerate
- Scone Sandstone
- Craighall Conglomerate
- Ruchil Flagstone
- Craig of Monievreckie Conglomerate
These rocks were laid down during the Lochkovian and Pragian stages of the Devonian Period. This means they are very old, dating back millions of years!
