Lewisian Gneiss Rock, Isle of Lewis -the Geology of the Outer Hebrides is  important - as the predominant rock type is a Lewisian Gneiss - a metamorphic rock which is astonishingly up to 3 billion years old, making it the oldest rock in Britain - two thirds the age of the Earth.

Lewisian Gneiss Rock, Isle of Lewis -the Geology of the Outer Hebrides is important - as the predominant rock type is a Lewisian Gneiss - a metamorphic rock which is astonishingly up to 3 billion years old, making it the oldest rock in Britain - two thirds the age of the Earth.

Two activities to introduce or review information about the types of rocks; Igneous, Sedimentary, and Metamorphic. One focuses on the 3 main types of rocks, and the other is a simplified Rock Cycle Diagram with interpretation questions. Can be a teacher led activity or individual work time, or center activity.

Rock Cycle and Rock Types - Activities

Two activities to introduce or review information about the types of rocks; Igneous, Sedimentary, and Metamorphic. One focuses on the 3 main types of rocks, and the other is a simplified Rock Cycle Diagram with interpretation questions. Can be a teacher led activity or individual work time, or center activity.

The cliffs at Millook Haven in north Cornwall, England, have very striking folded rock formations. Their zig-zag recumbent folds form unusual chevrons. The metamorphic sedimentary rock of the cliffs is known as Killas and the folds were caused by the intrusion of granite.

The cliffs at Millook Haven in north Cornwall, England, have very striking folded rock formations. Their zig-zag recumbent folds form unusual chevrons. The metamorphic sedimentary rock of the cliffs is known as Killas and the folds were caused by the intrusion of granite.

Gneiss - Gneiss is a metamorphic rock form characterized by discontinuous, altering light and dark layers, banding caused by segregation of different types of rock, typically light and dark silicates.

Gneiss - Gneiss is a metamorphic rock form characterized by discontinuous, altering light and dark layers, banding caused by segregation of different types of rock, typically light and dark silicates.

SC.4.E.6.1 Identify the three categories of rocks: igneous, (formed from molten rock); sedimentary (pieces of other rocks and fossilized organisms); and metamorphic (formed from heat and pressure).

Types of Rocks

SC.4.E.6.1 Identify the three categories of rocks: igneous, (formed from molten rock); sedimentary (pieces of other rocks and fossilized organisms); and metamorphic (formed from heat and pressure).

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