How To Identify Igneous Rocks In Thin Section Hand Sample Geo Girl In igneous petrology, you need to identify igneous rocks and the minerals those rocks are made of in both hand specimen and thin section. in this video, i sh. Learn to identify igneous rocks in thin section and hand sample through this comprehensive 31 minute video tutorial. explore the characteristics of various igneous rock types, including basalt, gabbro, diabase, rhyolite, granite, syenite, andesite, diorite, dacite, peridotite, obsidian, pumice, scoria, anorthosite, and tuff.
Hand Specimen Description Of Rocks At Leonardo Steele Blog Learning to identify minerals in thin section takes practice. but, if we have a hand specimen or know what kind of rock we are looking at, the most likely possibilities are limited – and identification is simplified. and some common minerals have key properties that make identification straightforward. 2 thin section the thin section gives you the opportunity to make a more thorough investigation of the mineral properties and relationships. where possible try and collect quantitative information on the minerals you are observing (extinction angles etc.). 1. visual inspection of thin section: produce a brief description of the slide simply held. Most optical mineralogy today involves specially prepared thin sections (0.03 mm thick specimens of minerals or rocks mounted on glass slides). video 1 (linked in box 5 2) explains how we make thin sections, and figure 5.1, the opening figure in this chapter, shows an example. figure 5.4 above shows a microscope view of a thin section that. Igneous rocks (fiery rocks) are made when molten material inside or outside the earth cools and becomes solid. this melted rock is called magma when it is inside the earth. when magma finds its way to the surface through cracks or volcanoes, it is called lava. when lava cools on top of the earth’s surface, it forms extrusive, or volcanic.
Comments are closed.