. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 59 one followed long enough after the other to have permitted the first to quite thoroughly cool. The specimen came from a boulder in the bed of the Branch, 2^4 miles west of Elizabethtown. The dikes sometimes present extremely interesting exposures. Figure 9 was sketched in the north fork of Walker brook in the extreme southwest corner of the Elizabethtown sheet. It shows some very striking little faulted blocks of a dike in anorthosite. Presumably the dike was once continuous but in being broke
. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 59 one followed long enough after the other to have permitted the first to quite thoroughly cool. The specimen came from a boulder in the bed of the Branch, 2^4 miles west of Elizabethtown. The dikes sometimes present extremely interesting exposures. Figure 9 was sketched in the north fork of Walker brook in the extreme southwest corner of the Elizabethtown sheet. It shows some very striking little faulted blocks of a dike in anorthosite. Presumably the dike was once continuous but in being broken and separated into the little blocks it held its sharply angular form while the anorthosite which is here much crushed and granulated, molded around it. Figure 10 shows a dike in a jagged crevice. Figure 7 is a map of a small dike which appears in the bed of the Branch just above the mill, about a mile or less on the stage road from the Windsor hotel to the Keene valley. It can be followed. Fig. 11 Network of basaltic dikes in anorthosite and crossing the bed of Slide brook The dikes str-ke r>. 450 w. in the bed of the cascading brook from one end to the other. Figure n illustrates an interlacing network of dikes. These dikes must have entered the wall rocks under very great pressure, and while in a state almost as fluid as water, must have penetrated every little crevice and crack open to them. They ob- viously followed the chief structural lines of weakness, and prob-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum. Albany : University of the State of New York
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectscience, bookyear1902
