A bouden. The darker blocks of quartzite reacted 'brittle' as the calc-silicate matrix (ductile) flowed around it, breaking it into pieces and carrying it away. Locals refer to it as the 'fallen train'. |
An intrusive dike, basaltic in composition. |
Quartz-rich sills known as the 'snakes'. |
A Precambrian sink-hole. |
Ductile shear zone in Adirondack metamorphic. The crystals in the rock were stretched as the rock sheared along a line seen in this picture. |
Another example of an intrusive dike. This one in particular can be traced at least a quarter mile up the stream bed. |
A picture of ductile behavior. Calc-Silicate material flowed into the more brittle anorthosite. As can be seen the anorthosite has been heavily metamorphosed, and in some places folded and pulled apart by the invading material. |
This photo was taken at the Barton Garnet Mine. The red rock is almandine garnet, the circle of black around the outside is amphibole, and the matrix surrounding is meta-basalt. Apparently when the mine was in operation there were garnets found, that after being excavated, the empty space left behind could house the body of a grown man. |