Rock Identifier

Category

Metamorphic Or Sedimentary Depending On Local Grade

Browse metamorphic or sedimentary depending on local grade specimens identified by the Rock Identifier community.

Learn about Metamorphic Or Sedimentary Depending On Local Grade in the encyclopedia

Greenschist

Granulite

Slate

Turbidite

Gneiss

Schist

Chlorite Schist

Chlorite Schist

Amphibolite

Garnet Schist

Migmatite

Biotite Schist

Khondalite

Banded Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (Foliated Metamorphic Rock)

Gneiss (Gneissic Metamorphic Rock) — metamorphic

Gneiss

Gneissic Metamorphic Rock

Gneiss (specifically Granitic Gneiss) (Gneissic Metamorphic Rock) — metamorphic

Gneiss (specifically Granitic Gneiss)

Gneissic Metamorphic Rock

Shale or Argillite (Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)) — Sedimentary or Metamorphic (low grade)

Shale or Argillite

Shale (fine-grained clastic sedimentary rock) or Argillite (low-grade metamorphic rock derived from shale)

Sedimentary or Metamorphic (low grade)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Banded Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss (Metamorphic rock)) — metamorphic

Gneiss

Gneiss (Metamorphic rock)

Anthracite Coal (Anthracite (Metamorphic/High-grade Sedimentary Coal)) — sedimentary

Anthracite Coal

Anthracite (Metamorphic/High-grade Sedimentary Coal)

Quartz-rich rock, possibly quartzite (Quartzite (provisional identification; predominantly quartz, SiO₂)) — metamorphic

Quartz-rich rock, possibly quartzite

Quartzite (provisional identification; predominantly quartz, SiO₂)

Phyllite (Phyllite) — metamorphic

Phyllite

Phyllite

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Copper-bearing volcanic breccia (Altered andesite or rhyolite breccia with secondary copper minerals, likely chrysocolla and/or malachite) — igneous

Copper-bearing volcanic breccia

Altered andesite or rhyolite breccia with secondary copper minerals, likely chrysocolla and/or malachite

Fossilized shell or small fossil fragment (Indeterminate fossil; possibly a partial gastropod or bivalve, mineralized with calcite) — fossil

Fossilized shell or small fossil fragment

Indeterminate fossil; possibly a partial gastropod or bivalve, mineralized with calcite

Banded Gneiss Pebble (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss Pebble

Gneiss (Metamorphic Rock)

Banded Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Banded Gneiss

Gneiss (Metamorphic Rock)

Granitic Gneiss (Gneiss (Metamorphic Rock)) — metamorphic

Granitic Gneiss

Gneiss (Metamorphic Rock)

Gneiss (High-grade regional metamorphic rock (Foliated Gneiss)) — metamorphic

Gneiss

High-grade regional metamorphic rock (Foliated Gneiss)

Greenstone pebble (likely altered basalt or serpentine) (Greenschist-facies mafic rock; commonly chlorite–actinolite–epidote ± serpentine) — metamorphic

Greenstone pebble (likely altered basalt or serpentine)

Greenschist-facies mafic rock; commonly chlorite–actinolite–epidote ± serpentine

Mica Schist (Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)) — metamorphic

Mica Schist

Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)

Banded Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Banded Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Granite Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss (High-grade metamorphic rock (Gneiss)) — metamorphic

Gneiss

High-grade metamorphic rock (Gneiss)

Gneiss (Gneiss (High-grade Metamorphic Rock)) — metamorphic

Gneiss

Gneiss (High-grade Metamorphic Rock)

Gneiss (Gneiss (foliated metamorphic rock)) — metamorphic

Gneiss

Gneiss (foliated metamorphic rock)

Mica Schist (Garnetiferous) (Garnet-Mica Schist) — metamorphic

Mica Schist (Garnetiferous)

Garnet-Mica Schist

Mixed rounded river pebbles, probably quartz-rich metamorphic and volcanic rocks (Predominantly quartzite/metachert, with possible rhyolite, sandstone, and iron-stained quartz; exact species cannot be determined confidently from the image) — rock

Mixed rounded river pebbles, probably quartz-rich metamorphic and volcanic rocks

Predominantly quartzite/metachert, with possible rhyolite, sandstone, and iron-stained quartz; exact species cannot be determined confidently from the image

Gneiss (specifically Epidote-Quartz Gneiss) (Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)) — metamorphic

Gneiss (specifically Epidote-Quartz Gneiss)

Gneiss containing Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH)) and Quartz (SiO2)

Milky Quartz (Quartz (Silicon Dioxide - SiO2)) — mineral

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Feldspar (specifically Orthoclase or Plagioclase) (Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate) — mineral

Feldspar (specifically Orthoclase or Plagioclase)

Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate

Polished petrified wood (Silicified wood, chiefly microcrystalline quartz (SiO₂), often with chalcedony and iron oxides) — fossil

Polished petrified wood

Silicified wood, chiefly microcrystalline quartz (SiO₂), often with chalcedony and iron oxides

Zoisite with Ruby (Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)) — metamorphic

Zoisite with Ruby

Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)

Polished yellow calcite pendant (Calcite (CaCO₃)) — mineral

Polished yellow calcite pendant

Calcite (CaCO₃)

Coarse-grained granite (Granite; quartz–alkali feldspar–plagioclase rock with biotite/hornblende) — igneous

Coarse-grained granite

Granite; quartz–alkali feldspar–plagioclase rock with biotite/hornblende

Rounded pale pebble, likely quartz-rich rock (Indeterminate; possibly quartzite or weathered limestone) — sedimentary

Rounded pale pebble, likely quartz-rich rock

Indeterminate; possibly quartzite or weathered limestone

Quartz vein in host rock (Milky quartz (SiO₂), likely in a metamorphic host such as schist or gneiss) — metamorphic

Quartz vein in host rock

Milky quartz (SiO₂), likely in a metamorphic host such as schist or gneiss

Quartz-rich pale rock fragment (Likely milky quartz (SiO₂), possibly quartzite) — mineral

Quartz-rich pale rock fragment

Likely milky quartz (SiO₂), possibly quartzite

Petoskey Stone (Fossilized Coral) (Hexagonaria percarinata) — sedimentary

Petoskey Stone (Fossilized Coral)

Hexagonaria percarinata