ELIZABETIITOWX AND PORT HEXRY QUADRANGLES 



1^7 



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, 



. Q , ' O' <^ • O ' O > O '_ 



Mag 



nexi 



tite 



.tme*fonc AmpKiboUte. 



o • o ' q 

 •o • o 



OjOjO 



Dr-ift 



rig 30 Cross section of the Steele ore b^dy near Elizabethtow -. 



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 Adirondacks 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 hangirg. 



b The titanifcrous magnetites 



The interesting mineral deposits of this character arc more nu- 

 m.erous 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, at 

 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 



