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Rock Thin Sections Use of a digital microscope Dr Peter Copley Newcastle College June 2004
Philip Harris (Motic) Microscope Cost: about £1200 (to the Biology dept!) Includes software
Digital camera Binocular eyepiece (x10) Objective Lenses (x4,x10,x40, X100 oe)
Main Power switch Camera power Power input usb
No polarising facilities Adequate for basic textural images. Exam papers only use/expect monochromatic drawings.
Acknowledgement Thin sections Geology department Keele University
Desert sandstone (x40)
Keele Sandstone (x40)
Sherwood Sandstone (x40) ‘Bunter Sst’
Oolitic Limestone (x40)
Limestone – calcite crystals in shell (x100)
Peridotite (x40) Olivine Pyroxene
Porphyrytic Olivine Basalt Groundmass
Ophitic Texture (x40) Pyroxene Feldspar
Zoned Olivine crystal (x40)
Spherulitic Pitchstone (x40)
Garnet Mica Schist (x100) Mica
Chiastolite Slate (x40)
Gneiss (x40)Felsic minerals Mafic minerals
Sillimanite needles (x400)
Kyanite & Biotite (x100)
What if you cannot afford £1200?
A cheaper alternative! About £40 But discontinued in 2002 by Intel. But now available…….
Don’t expect the image quality to be as good!!!
Oolitic Limestone (x60)
Porphyritic Basalt (x60)
Ophitic Texture (x60) Pyroxene Feldspar
Chiastolite Slate (x60)
Will it do??? That’s up to you!
ROCKS under the microscope. The ROCKS you need to know granite diorite gabbro dolerite basalt shelly limestone sandstone arkose greywacke marble schist.
Compaction and cementation Melting and solidification Heat and/or pressure metamorphic igneous sedimentary Melting Weathering and erosion Heat and pressure.
MINERAL AND ROCK IDENTIFICATION Unit 3A. AMETHYST (QUARTZ) Category: Mineral.
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Chapter 4 section 3. Rocks that have been changed because of changes in Heat Pressure Or the presence of hot, watery fluids Can be formed from igneous,
After 7.5 mins, 1 st P wave arrived at New York. EAS 220 Lab 4: Igneous Rocks.
Soil that contains large quantities of calcium was most likely formed by the weathering of (1) rock salt (3) coal (2) quartzite (4) limestone.
Matching Metamorphi c Rocks with their Sedimentar y Source Rocks.
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Quiz Get out you ESRT and a piece of paper The following questions are from your ESRT. You’ll have a minute per question…
ROCK IDENTIFICATION LAB. What type of rock is this? Where or how is it formed?
Metamorphic Rocks. Metamorphic rocks Subjected to heat (and stress) Results in changes in the appearance –Mineralogical –Textural Any rock can be metamorphosed.
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Metamorphic Rocks. Questions What are metamorphic rocks? What processes are involved in forming metamorphic rocks?
Mahrous M. Abu El-Enen Faculty of Science, Mansoura University Igneous and metamorphic Petrology.
4-4 pgs IN: What are some ways that sedimentary rock can form? Can you classify the four we looked at?
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Rocks The Geologic Dictionary. Rock Cycle Magma Igneous Rocks Sedimentary Rocks Metamorphic Rocks Sediment Crystallization Melting Metamorphism Lithification.
GEOS 254: INTRODUCTION Petrological microscopes are used to: (a) identify the minerals present (a) identify the minerals present (b) determine the microstructure.
+ Minerals and Rocks. + Anchor Observe the rocks A B C at your table classify them and provide evidence for your classification.
Don’t you wish you were here?. The Rock Cycle Igneous Rocks.
Chapter 3 - Rocks Notes January What are rocks? Rocks in Earth’s Crust 1.Petrologists study rocks & minerals. 2.Rocks are made of minerals (2000).
Metamorphic Rocks “If something is gneiss, don’t take it for granite.”
ROCK IDENTIFICATION. What type of rock is this? Where or how is it formed?
Formation and Destruction of Rock Types Rock Types.
Types of Rocks Sedimentary Igneous Metamorphic. Sedimentary Rock Write the term and what you believe it to mean.
Igneous Sedimentary Metamorphic. Classify these rocks Gneiss Pumice Limestone Slate Shale Obsidian Quartzite Sandstone Basalt Conglomerate Marble Granite.
Metamorphic Rocks A GALLERY. Foliated Metamorphic Rocks Foliated: Minerals are aligned in layers or rows. “consisting of thin sheets or laminae” Banded:
Metamorphic Rocks Rocks Under Stress. Metamorphism Recrystalization Solid-State Chemical Reactions No Melting.
Common Rock Types Colby Geology. Igneous Rocks Classification based on composition and texture. COMPOSITION Principally the rock-forming minerals.
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Rocks and Minerals Identification. I know a rock is sedimentary if: I see layers of sediment cemented together OR I see ripple marks OR It looks like.
Rocks and the ROCK CYCLE. SEDIMENTARY ROCK METAMORPHIC ROCK IGNEOUS ROCK Magma Sediments High Temperature High Pressure Melting Cooling Crystallization.
Mr. Barr. When sediments are compacted and cemented together, this type of rock is formed. A. Sediments B. Sedimentary C. Metamorphic D. Igneous E. Magma.
The rock cycle illustrates the process that creates and changes rocks. The rock cycle shows the three types of rock- igneous, metamorphic, and sedimentary-
Metamorphism: New Rocks from Old Chapter 10 Geology Today Barbara W. Murck, Brian J. Skinner N. Lindsley-Griffin, 1999 Disharmonic Folding in Gneiss.
... the textural and mineralogical change rocks undergo when put under great heat and/or pressure. Metamorphism.
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The process by which existing rock is changed by heat and pressure is called metamorphism Original sedimentary or igneous rock is known as parent rock.
Name: _____________________ Date: ______ / Page #: _____Notes – Minerals & Rocks Mr. Jensen / Period _____.
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