Chevron Folds

Rocky Montain National Park

Gneiss

Feldspars interlaced with Hornblende

The Transformation of Greenland

At the surface this looks like stratifeid sediments but closer examination shows heavily folded overturned structures and metamorphic features, includions on a massive scale, gneiss like features and what would appear to be boundinages (Except they are bigger than normally described)

Pegmatite

pegmatite, almost any wholly crystalline igneous rock that is at least in part very coarse grained, the major constituents of which include minerals typically found in ordinary igneous rocks and in which extreme textural variations, especially in grain size, are characteristic. Giant crystals, with dimensions measured in metres, occur in some pegmatites, but the average grain size of all such rocks is only 8 to 10 cm (3 to 4 inches). Encyopedia Britannca

Greenland Gneiss

Boudin

boudinage, (from French boudin, “sausage”), cylinderlike structures making up a layer of deformed rock. Seen in cross section, the cylinders, or boudins, are generally barrel-shaped but may be lenslike or rectangular. They commonly lie adjacent to each other and are joined by short necks to give the appearance of a string of sausages (hence their name). The thickest boudins are about 20 m (65 feet) thick, and the thinnest about 1 cm (0.39 inch). Encylopedia Britannica

Boudin

boudinage, (from French boudin, “sausage”), cylinderlike structures making up a layer of deformed rock. Seen in cross section, the cylinders, or boudins, are generally barrel-shaped but may be lenslike or rectangular. They commonly lie adjacent to each other and are joined by short necks to give the appearance of a string of sausages (hence their name). The thickest boudins are about 20 m (65 feet) thick, and the thinnest about 1 cm (0.39 inch). Encylopedia Britannica

Phyllite

phyllite [mineral] (phyl'-lite) (a) A general term used by some French authors for the scaly minerals, such as the micas, chlorites, clays, and vermiculites. (b) A general term for minerals with a layered crystal structure." Glossary of Geology 5th Ed.

Misnamed Scoria - ACtually Clinkers

"When lignite beds burn, they harden, sinter (sintering is a process that fuses material into a hard mass, without melting it), or sometimes they melt the overlying and surrounding rocks. The baking process colors the nearby materials dominantly red, but shades of black, gray, purple, yellow, and other hues are common too.nn13f4.jpg (271516 bytes) The intensity of the colors depends on the mineral composition and grain size of the material that was baked and also on how hot a temperature was reached during the baking process. The reddish color, which is most common, is due primarily to the presence of the mineral hematite (iron oxide, the same as common rust). The intensity of the colors of clinker also vary depending on whether the material is dry or wet. After a shower, the clinker is typically much brighter red than when it is dry." "North Dakota's Clinker." North Dakota's Clinker. N.p., n.d. Web. 20 Nov. 2015. .

Fjords of Baffin Island

FJORD (Pron: fyord) (a) A long, narrow, winding, glacially-eroded inlet or arm of the sea, U-shaped and steep-walled, generally several hundred meters deep, between high rocky cliffs or slopes along a mountainous coast; typically, with a shallow sill or threshold of solid rock or earth material submerged near its mouth, and becoming deeper inland. A fiord usually represents the seaward end of a deeply excavated glacial-trough valley that is partially submerged by drowning after the melting of the ice. Examples: along the glaciated coasts of Alaska, Greenland, and Norway. (b) Any embayment of the seacoast in a Scandinavian country regardless of the adjacent topography, as afjard in the low flat Swedish coast or aförde in eastern Denmark. Etymol: Norwegian. Cf: estuary; ria; sea loch. Var. spelling: fiord.

Chevron Folds