THIRD REPORT OF THE DIRECTOR IQOD 2^ 



production here is mostly for local use. These quarries are in the 

 Ithaca formation and those at Oxford and Norwich are of the 

 Oneonta horizon. A brief visit was made to the quarries at Elmira. 

 The quarries just to the east of Elmira, at Horseheads and at Pine 

 Valley are in the High Point sandstone, one of the higher divisions 

 of the Portage-Chemung. Those at Warsaw and Portageville also 

 belong to the High Point or Portage sandstones. Quarries in the 

 Chemung formation have been opened to the south of Elmira and 

 in Allegany, Cattaraugus and Chautauqua counties, but they have 

 not been examined in detail. 



MINERALO&Y 



The research work in mineralogy during the past season has been 

 confined principally to the crystallography and genesis of New 

 York occurrences of minerals, the results of which have been in- 

 corporated in a paper now in press on the minerals of Lyon Moun- 

 tain, N. Y. This investigation attacks the problem of the conditions 

 affecting the deposition of calcite as expressed by the crystal habit. 

 Some interesting conclusions were reached which confirmed the 

 results obtained in a previous paper on the calcite of Union Springs.-^ 

 Three new crystal forms are added to the list for calcite, as well as 

 some highly interesting combinations and groupings. Some inter- 

 esting twin crystals are described and figured under albite and some 

 rare and interesting combinations under stilbite, titanite and apatite. 



The curatorial work of the section has been much reduced 

 through the abandonment of the exhibited mineral collection last 

 December. 



The work of collecting new material both for research study and 

 for an enlarged and improved mineral collection has progressed 

 v.dth gratifying results. A fine series of minerals from the Sterling 

 mine, Antwerp, was added to the already good collection from this 

 locality. These included two specimens showing garnierite asso- 

 ciated with millerite, and four specimens of goethite, both of which 

 species are new from this locality. The goethite occurs as radiating 

 tufts of light brown crystals like fine camel's-hair brushes. These 

 are found on the surface of quartz and dolomite which line the 

 cavities in the red hematite. 



A series of 45 specimens of zircon in quartz and oligoclase was 

 collected from a reopening of the old locality at Mineville. These 

 equal in size and development the zircon crystals formerly obtained 

 from this locality. 



'N. Y. State Mus. Bnl. 98. 



