Local Rocks

Within easy reach of Glasgow there lies a rich variety of igneous, sedimentary and metamorphic rocks. These rocks were laid down during a period of over 500 million years, starting in the Neoproterozoic period (1000 to 541 Ma) and finishing in the Triassic period (252 Ma to 201 Ma).

(A chronostratigraphic chart describing the internationally agreed geological time scale can be found here.)

The map below shows the rock types that are found in the extended Glasgow area, and the key to the right describes the symbols used in the map. Below the map are two panels. The left panel contains links to pages describing the rock cycle, the three different rock types (igneous, sedimentary and metamorphic) and rock-forming minerals. The right panel contains links to pages describing twelve sites in the extended Glasgow area. These links can also be accessed by moving the mouse pointer over the pins on the map. When the pointer is above a pin, a hint with the site name is shown, and the page describing the site can be opened by clicking the mouse button.

Minerals, Rocks & Fossils

Rock-forming Minerals

A mineral is a naturally occurring inorganic solid with an orderly crystalline structure and a well-defined chemical composition.

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The Rock Cycle

The rock cycle is a process in which rocks are continuously transformed between the three rock types igneous, sedimentary and metamorphic.

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Igneous Rocks

Igneous rocks are formed when molten material from within the Earth, called magma, cools down and solidifies forming crystals.

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Sedimentary Rocks

Sedimentary rocks are formed by the consolidation of sediments which settle out of water, ice or air and are accumulated on the Earth's surface.

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Metamorphic Rocks

Metamorphic rocks are formed when pre-existing rocks are altered by high pressure, high temperature, or a combination of the two.

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Scottish Fossils

Scottish fossils are very varied, reflecting the different tectonic settings that Scotland has experienced throughout geologic time.

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Selected Sites