Metamorphic rocks are the most complex rock class, forming as they do by the compression and chemical alteration of other rocks, both sedimentary and igneous. This gallery starts with the rocks derived from sedimentary rocks (also called metasedimentary rocks or the pelitic sequence), then presents those derived from igneous rocks (called metaigneous rocks or the basaltic sequence). I also have a larger A-to-Z gallery of specific metamorphic rock types.
- Metamorphic PebbleA pretty puzzle
- SlateFirst of the pelitic series
- PhylliteMicas add shine and wave
- Phyllite CloseupA landscaper's chip
- Mica SchistNew York City's finest
- Mica Schist Hand Specimen, ManhattanAll you see is mica
- Schist in OutcropSchist in the landscape
- Schist in SculptureSometimes sublime
- GneissIn the western desert
- New York GneissFrom upstate New York
- Garnet GneissPressure-cooked on "high"
- Migmatitic GneissPlastic behavior
- Graphic Index
- Text Index
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