OKLAHOMA ACADEMY OF SCIENCE 113 



A^nO — Oxide of manganese .15 



BaO — Barium oxide Not detetttd 



SrO — Strontium oxide Not detected 



Li,0--Lithia ■ .00 



Tcial ._- 9971 



From the microscopic and chemical examinations it is to be con- 

 cluded that the Black Mesa rock is an olivine diabasic basalt. 



The foregoing paper discusses the relationships, topographic 

 features, microscopic characteristics, and chemical composition of 

 Black Mesa basalt. To this is to be appended the following refer- 

 ences for some of the above information : 



(1) "Geology and Water Resources of Oklahoma," U. S. G. S. 

 Water Supply Paper No. 148 by C. N. Gould. 



(2) "The Raton Mesas of New Mexico and Colorado," Geol- 

 ogical Review for July, 1921, by Willis T. Lee. 



(3) The Geology of Cimarron . County (unpublished) by E. 

 P. Rothrock. 



XXIL BUILDING MATERIALS OF OKLAHOMA 



M. C. Cakes 



From the Oklahoma Geological Survey. 



There is a very close relation between the geology of a region 

 and its housing problems. The early settlers made their dugouts 

 where geological processes had made the digging easy and ' the 

 drain.'Hge good. They biult their cabins where tree growing forma- 

 tions outcrop. Good limestone gave a community stone houses while 

 the lack of a more suitable material gave rise to the sod house. 



Timber being a light-weight material, it has been shipped great 

 distances so that the tree bearing formations have extended their 

 influence far and wide, causing extreme uniformity among Ameri- 

 can houses. 



Now that the timber is rapidly nearing exhaustion, the local 

 formations will exert their latent influence. Since stone, cement, 

 gypsum, etc. are all relatively heavy the result will be that each 

 community will have its own type of house, and individuality 

 will be the rule where uniformity now prevails. 



To bring up to date tihe Survey's information on the present 

 development of the state's resources in building materials, David 

 Hedley and the writer made an extended inspection trip during the 

 past field season. In the course of this trip we visited in the 

 order named the following places: Pauls Valley, Davis, Sulphur, 



