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
A mineral is a naturally occurring inorganic solid with an orderly crystalline structure and a well-defined chemical composition.Find out more
The Rock Cycle
The rock cycle is a process in which rocks are continuously transformed between the three rock types igneous, sedimentary and metamorphic.Find out more
Igneous rocks are formed when molten material from within the Earth, called magma, cools down and solidifies forming crystals.Find out more
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.Find out more
Metamorphic rocks are formed when pre-existing rocks are altered by high pressure, high temperature, or a combination of the two.Find out more
Scottish fossils are very varied, reflecting the different tectonic settings that Scotland has experienced throughout geologic time.Find out more
Sedimentary and volcanic rocks of Lower Carboniferous age and evidence for the Campsie Fault.
A basalt plug which is the only remaining evidence of the volcano which existed on this site 330-340 million years ago.
Beautifully preserved fossil tree stumps and roots from the Carboniferous period in Glasgow’s Victoria park.
Sedimentary rocks from the Carboniferous period and evidence of the Quaternary glaciation.
The relationships between the Dalradian block and the Midland Valley; details of the structure and stratigraphy of the Highland Border Complex; recumbent folding in Upper Dalradian rocks.
Stratigraphy and sedimentation of the Lower and Upper Devonian; the angular unconformity which separates them.
The Highland Boundary Fault, which separates the Highlands from the Lowlands, with metamorphic rocks to the north and sedimentary rocks to the south.
An association of serpentenite, chert and pillow lavas that represents an ophiolite suite.
Succession of Carboniferous rock types and junctions of the Carboniferous with the Devonian and the Permian.
A Palaeogene quartz-feldspar-porphyry sill displaying massive columnar jointing, with members of the Palaeogene dyke swarm.
A large deeply-eroded volcanic vent of Lower Carboniferous age.
Dalradian schists, Hutton's classic unconformity and Permian sandstones and breccias.