148 'Scientific Intelligence. 



Alfred C. Lane : Possible depth of miuing and boring. 



Harry Fielding Reid: Notes on glaciers. 



Frank Leverett: The relation between ice lobes, south from the Wisconsin 

 driftless area; The loess of western Illinois and southeastern Iowa. 



G. Frederick Wright: High level terraces of the middle Ohio and its tribu- 

 taries. 



H. L. Fajrchild: Four great kame areas of western New York. 



Warren Upham : Preglacial and postglacial channels of the Cuyahoga and 

 Rocky rivers. 



(!. H. Hitchcock: Paleozoic terranes in the Connecticut valley. 



C. Willard Hayes: The Devonian formations of the southern Appalachians. 



T. C. Chamberlin : The Natchez formations. 



Arthur Keith: Some stages of Appalachian erosion. 



5. TJie Cerrillos Goal Field; by John J. Stevenson. 

 (Abstract of a paper presented at the winter meeting of the Geo- 

 logical Society of America.) — This paper describes a small por- 

 tion of the area formerly known as the Placer coal field, south 

 irom the Rio Galisteo and about 25 or 30 miles south from Santa 

 Fe, New Mexico. The only rocks within this area are Laramie 

 and Eruptive. The latter proceed from the laccolite known as 

 the Placer or Ortiz mountains and occur in two sheets separated 

 by about 400 feet of Laramie beds. These sheets, each about 

 200 feet thick, are intruded between the stratified rocks and 

 iollow their dip closely. The rock has been identified by Prof. 

 Kemp as trachyte but closely allied to andesite. The Ortiz or 

 Placer mountains are about two miles from the most southerly 

 locality visited. 



The column of Lamarie exposed is not far from ] ,000 feet 

 thick and contains several coal beds of economic importance, 

 only three of which are discussed in this paper. The highest 

 bed, about 900 feet from the base of the column and known as 

 the White Ash, has been opened at many places along the princi- 

 pal gorge, Coal canon. At the most northerly mine, the White 

 Ash, its coal is bituminous, containing 39 per cent of volatile 

 combustible, but at the Lucas mine, not more than 3,000 feet 

 further up the canon, it is anthracite with but 1 per cent of 

 volatile. The interval between these mines contains for the most 

 part coal so crushed as to be practically unmarketable; but as 

 shown in one level of the White Ash mine, the transition from 

 soft to anthracite coal is gradual. Further up the canon, toward 

 the Ortiz mountains, the coal becomes harder and at one opening 

 resembles the Rhode Island anthracite. 



The lower important bed on Coal canon is the Cook- White, 

 which is not mined at present. It shows the same changes, 

 being distinctly anthracite at the old openings up the canon, but 

 becoming bituminous lower down, where it contains 30 per cent 

 of volatile. A small bed, midway between the White Ash and 

 the Cook- White, shows no variation, being bituminous at the 

 most southerly point visited, although the White Ash is anthra- 

 cite in the same locality. But this bed is much cut by clay 

 seams and is not continuous. The cause of the metamorphosis of 

 the coal is contact with eruptive rocks. The clay seams of the 



