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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.

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from Tina's Dynamic Homeschool Plus

Metamorphic Edible Rocks & Notebooking Pages

Metamorphic Edible Rocks & Notebooking Pages. Fun and easy recipe for learning about rocks and 2 free notebooking pages. #rocks #ediblecrafts #ihsnet

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Disharmonic folds in gneiss. Gneiss is a common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks.

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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.

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Diopside [CaMgSi2O6]. Environment: Basic and ultrabasic igneous and metamorphic rocks. Merelani Hills, Lelatema Mountains, Tanzania

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from Science 6 at FMS

Identifying Rocks

Rock Cycle [More important than you think! When picking rocks for hardscapes you want to use Metamorphic rock in most cases, especially with water (so it doesn't leach anything into the water)

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