. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 177 about a mile southeast of Elizabethtown village and is exceptional in having a thin bed of limestone of the Grenville for its hanging wall. The pit was filled with water so that the lower edge of the ore was not seen. The exposed face was cut by a small fault which is illustrated in figure 30. The ore is a granular magnetite, O • 9 ' O # O ~Z~o *0 » 0 * O ' O - O ~ 0 - O • O • O • Q > Q • P • O « O •. Lme*ionc Amph?k>otite o • o • d o « o ? oj D»-tft. Magnetite Fig. 30 Cross section of
. Annual report. New York State Museum; Science; Science. ELIZABETHTOWN AND PORT HENRY QUADRANGLES 177 about a mile southeast of Elizabethtown village and is exceptional in having a thin bed of limestone of the Grenville for its hanging wall. The pit was filled with water so that the lower edge of the ore was not seen. The exposed face was cut by a small fault which is illustrated in figure 30. The ore is a granular magnetite, O • 9 ' O # O ~Z~o *0 » 0 * O ' O - O ~ 0 - O • O • O • Q > Q • P • O « O •. Lme*ionc Amph?k>otite o • o • d o « o ? oj D»-tft. Magnetite Fig. 30 Cross section of the Steele ore body near Elizabethtown and has an apparent strike northeast with a dip west. In only one other instance has ore in or next limestone been noted in the eastern Adirondack's and that* is the Weston bed, near Keene Center. Limestones are not far, however, from both the Cheever and the Pilfershire beds, in each case in the hanging. b The titaniferous magnetites The interesting mineral deposits of this character arc more nu- merous in the Elizabethtown and Port Henry quadrangles than elsewhere in the Adirondack region, but they are individually not as large nor as rich in iron as are those near Lake Sanford, ai the headwaters of the Hudson and in the Santanoni quadrangle. The geological associations are also different. The Lake Sanford bodies are in the anorthosites, whereas, the ones here specially treated are in the basic gabbros. So far as our detailed explora- tions have gone, the basic gabbros seem to reach their greatest de- velopment in the area covered by the two quadrangles here described and extending a short distance north and south. Through- out their many exposures the titaniferous magnetites occur rather frequently and while at present not possessing commercial values as sources of iron, they are of much scientific interest. The basic gabbros in this section favor the borders or general. Please note that these images are extracted
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