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This is an image of a generalized geologic time scale with Ohio's rocks superimposed upon it. It gives context for Ohio's Paleozoic rocks and Cenozoic…
Rock.OH.By.Age.Photos
From William Reinthal
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This video contains basic ID information for some basic rocks and rock types, along with a couple of minerals. It is not inclusive of all rock types we see in a typical…
Basic Igneous, Sedimentary, and Metarmorphic Rocks
From William Reinthal
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This is a photo of one of many textured pahoehoe lava surfaces exposed on the SE coast of the Big Island of Hawaii, formed as 1200°C basaltic lava begins to harden…
Pahoehoe Lava Surface
From William Reinthal
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This is a short video of banded iron formation, from the Marquette Range, in Ishpeming, MI.
Banded Iron Formation
From William Reinthal
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This is a short video from an outcrop of glacially scoured, 2.8 billion-year-ole, pillow basalts near Marquette, in the UP of Michigan
Pillow Basalts
From William Reinthal
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This video goes through some of the basic ways we can distinguish between many different classifications of rocks
Rock ID Video
From William Reinthal
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A short description of the identification of quartz, one of the most important rock-forming minerals.
Quartz
From William Reinthal
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A short video showing the basics of identifying pyrite.
Pyrite
From William Reinthal
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A short video that shows the basics of olivine identification
Olivine
From William Reinthal
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A short video describing the properties of two important minerals in the mica group.
Muscovite and Biotite Mica
From William Reinthal
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A short video describing the properties of two of the most important iron ore minerals, magnetite and hematite.
Magnetite and Hematite
From William Reinthal
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A short video describing the identification of one of the most important forms of potassium feldspar: microcline. Potassium feldspar is one of the most common minerals…
Potassium Feldspar
From William Reinthal
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A short video describing the cleavage of Hornblende, the most common of the Amphibole minerals.
Hornblende Cleavage
From William Reinthal
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A short video describing the differences between hornblende, the most common amphibole mineral, and augite, the most common of the pyroxene minerals.
Hornblende and Augite
From William Reinthal
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A short video describing two of the most common evaporite minerals, halite and gypsum (var. selenite), including distinguishing properties.
Selenite Gypsum and Halite
From William Reinthal
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A short video describing properties and origins for chert, from accumulations of phytoplanktonic remains, to precipitation of silica in high pH groundwater, often…
Chert
From William Reinthal
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