150 Scientific Intelligence. 



Meridian, in charge of Capt. G. M. Wheeler, Engineer Corps, 

 S. Arcnv. Washington, 1881. (Distributed in June, 1882.)—! 

 lessor S'tkvkns..n-s Report treats of the geology of North Cent 

 New Mexico and South Central Colorado, between 37° 20' N. i 

 35° 20' N. and west of lor 7.V \V., a region along the "Span 

 Ranges" and a continuation of the Sangre de Cristo Range— h 

 ing the Rio Grande on the west and headwaters of the Arkan 

 on the east. To the north the mountains arc high and sharp, < 

 peak over 14000 feet, while the southern part is coraparativ 

 " gentle in slopes and crossed by roads. He describes the cent 

 portion of the mountain region from north to south as consist] 

 mostly of Archaean rocks ; on the east side and part of the t 

 Carboniferous beds, resting on the Arcbaan; next east, overlyi 

 the Carboniferous or else "the Archaean, Cretaceous strata of 

 Dakota, Colorado and Laramie U r. .ii|-. exempting some doubt 



typical fossils 

 '.son Weeks in 



Thev are Iron, New .Mexico, and ivmvmiH. aceordin- to Dr. 

 White, rather the l>,,er part oithe Coal Measures than t he Middle 



>perie> 'found i, tin < , \f !m,W ,',, To!" t he ' Mi~ i-i M .i. A 

 species of Kotella here described, />. ,., nun-uJif,,;, White, is the 

 first of this irenus vet tv-,, utl ized I'm,,, the Carboniferous. The 



