Vermont's Green Mountains: Granite and Marble Geology

Vermont's famed Green Mountains are primarily composed of two distinct rock types:

• Granite – an igneous rock formed from slowly cooled magma deep underground. It typically contains feldspar, quartz, and mica, giving it a speckled, durable texture.
• Marble – a metamorphic rock created when limestone is subjected to intense heat and pressure. It is largely composed of calcite and often features elegant veining.

These rocks not only shape the landscape but have also driven Vermont's historic quarrying industry.