Lab 10

Metamorphic Rocks Lab Report Part 3: Classification of Metamorphic Rocks 1. Making use of the last diagram in Part 2 as a guide , complete the following table of your observations of the metamorphic rocks featured on Canvas (labeled Sample #’s 1-9). o Note the apparent texture of the sample o Describe the rock and any tests or minerals you recognize o Try naming the rock o Identify the type of parent rock Common Metamorphic Rocks Sampl e # Texture Description of rock or minerals noted Name Parent Rock 1 Wavy Shiny luster, wrinkled. Phyllite Mudstone/shale 2 Thin/Flak y Dark, thin, shiny. Biotite Granite 3 Sandy/Cry stally Quartz and sand conjugated, Quartzite Sandstone 4 Slaty rock cleavage Dull luster, brittle, breaks into smaller flat pieces. Slate Mudstone/Shale 5 Microcrys talline/ smooth cleavage surface Dull, glossy, greenish. Serpentinite Basalt/Gabbro/u ltra mafic rock 6 Coarse/ro ugh Crystally, rough, grainy. Gneiss Mudstone/shale 7 Coarse grained Pebbles stretched across surface Meta Conglomerate Conglomerate 8 Sandy/gra iny Smooth but coarse, bright, usually cool to touch. Marble Limestone 9 Glassy Black, glossy, kind of like Obsidian Anthracite Peat/lignite/bitu minous