By Kurt Hollocher
This e-book is an illustrative creation to metamorphic rocks as obvious within the box, designed for complicated highschool to graduate-level earth technology and geology scholars to jump-start their observational talents. as well as pictures of rocks within the box, there are many line diagrams and examples of metamorphic good points proven in skinny part. the skinny part images are all at a scale and in a context that may be concerning perspectives obvious within the box via a hand lens.
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This ebook is an illustrative advent to metamorphic rocks as obvious within the box, designed for complex highschool to graduate-level earth technology and geology scholars to jump-start their observational abilities. as well as photos of rocks within the box, there are lots of line diagrams and examples of metamorphic gains proven in skinny part.
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Extra resources for A Pictorial Guide to Metamorphic Rocks in the Field
Bolsøy, Moldefjord, Møre og Romsdal, Norway. 6 The brownish-gray rock to the left and right is brown-weathering, impure marble. The marble is exposed on either side of an amphibolite layer, between the yellow arrows, that is covered with yellow and light-gray lichen. The rocks are folded about an antiformal hinge that plunges gently downward into the water. Bolsøy, Moldefjord, Møre og Romsdal, Norway. 7 Shoreline outcrop of strongly folded, alternating layers of carbonate-bearing biotite schist and white to gray marble.
Dissolution has lowered the marble surface below that of the surrounding silicate rocks. Vardholmbukta, Moldefjord, Møre og Romsdal, Norway.
Vikeså, Rogaland, Norway. Mineral abbreviations: B, biotite; C, cordierite; G, garnet; K, K-feldspar; M, muscovite; O, orthopyroxene; S, sillimanite; St, staurolite. Red arrows in E and F point to yellow alpha particle radiation halos in cordierite, surrounding uranium- and thoriumbearing mineral inclusions (probably zircon or monazite). 2 Typical outcrop of slate with the cleavage nearly vertical. This is a metamorphosed turbidite sequence. The quartz-rich former sandstone layers, now quartzite, are massive, without easily visible cleavage.