Stone at center on top is a conglomerate which is a naturally cemented aggregate of pebbles and stream-worn stones. The pebbles are so completely cemented that they split as if cut by a diamond saw. Conglomerates are found in great quantities in pits to the south of Stratton. The banded rock was also found there in high quantity and in great sizes.
This is a beautiful rock showing alternating layers. I have seen boulders of this rock bigger than a car. What a beautiful rock for a landscaping project. I believe this to be a metamorphosed limestone showing layers of calcite, volcanic ash and sandstone. In some of these boulders, ash is clearly evident as well as remnants of fossils in the calcite layers.
The highlighted rock at bottom and the light green rock beneath it are a serpentine rock
Two rocks showing stages of change. The one at right shows fossils in some detail. The one at left shows a similar origin from a marine sediment but it shows no detail of shell fossils from which it is made. It has been changed by a great heat and pressure.
The stones in the center with the tinge of red were taken from a soapstone and talc quarry. As they weathered close to the surface of overlying soil, they have deposited bright red mineral pigment in pockets which were a source of mineral paint for the "Red Paint Indians" perhaps 10,000 years ago. The same stone not exposed to surface soil but buried deeper in the rock debris showed a brown pigment rather than the blood red. This discrepancy may be due to the amount of oxygen available for oxidation or perhaps the water exposure reacting to different minerals such as magnesium over iron. My professor will know.
The beautiful orange rock in the center is a Microline or Orthoclase Feldspar mineral. I need to research this.
Such a varied assemblage of minerals from a small area of perhaps 25 miles in diameter. These were found in streams and "sand pits". Already some patterns are emerging. Rocks from pitts West of Stratton show many examples of large and small, angular and round, fossil-bearing limestone rock and much rock of dark color (Mafic). Rocks found in pitts to the south of Stratton show less fossil-bearing rock and much light-colored igneous rock (Felsic). The distribution of the blood-red stone (a Jasper) is not frequent enough in the pitts to see a difference. This rock was harvested mainly from Alder stream to the north but is not commonly found in the Carrabasset to the south or Nash stream to the west. There are great sources of Jasper in the vicinity of Alder stream and Jim Pond.
rock and stones are taking over
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