18 KANSAS ACADEMY OF SCIENCE. 



While Prof. Mudge and I were at Humboldt, a gentleman told us there 

 was a trap dike in Linn county. I undertook to visit it as early as possible. 

 Only a short time before his death, Prof. Mudge wrote, asking me had I been 

 to Linn county. I had not then, but in December last I made the visit. 

 There was no trap dike. 



In conclusion, we would again call to mind the statement in the biennial 

 report, that there is no metamorphic rock in Kansas, and ask your attention 

 to the fact that the statement was scarcely published ere the author learned 

 that there was, and followed up the discovery with zest. 



Again, the rock specimens were in the hands of experts, who examined 

 them in reference to the question of metal or no metal, but overlooked for a 

 time the question, What led people to think there was metal there? Prof. 

 Patrick, who has also visited Silver City, in Woodson county, pronounces 

 that half-mile of land the most remarkable mineral district he has ever vis- 

 ited; and I, thinking the same, do not wonder that some uneducated men, 

 seeing indications very like what we see in Colorado, should have become 

 infatuated with the id^a of finding the precious metals. They see resem- 

 blances — a lack of geological knowledge hinders them detecting differences. 



Why do I mention these things? To suggest that if our State was thor- 

 oughly surveyed geologically, local reports could be investigated by a com- 

 petent official before time and money were wasted in useless enterprises, and 

 very probably knowledge would be obtained that could direct capital into 

 useful and remunerative undertakings. 



Further, we would suggest to local geologists to look out for signs of met- 

 amorphism and trap dikes. In other parts of the world to-day, and also in 

 the geological ages, there have been igneous overflowings without extensive 

 fracture, and this was not unknown in the Cretaceous period. These would 

 cause local metaraorphism and peculiar mineral conditions. Let the geolo- 

 gists of Labette, C<jwley and other counties, besides looking for fossils and 

 the line of outcrop, look also for crystaline structure and local fiiults, till 

 we know more fully than we know now the Igneous Rocks of Kansas. 



ARE THERE IGNEOUS ROCKS IN CHEROKEE COUNTY? 



BY ERASMUS HAWORTH, EMPIRE CITY, KANSAS. 



In the March number of the Kansas City Review of Science and Industry, 

 the writer published an article entitled, "The Chert Rocks of Sub-carbon- 

 iferous Kansas." In this article two points are particularly insisted upon: 

 First, that the chert rocks have been deposited in layers, are true stratified 

 rocks, and are not metamorphosed limestone; second, that there is not only 

 no indication of volcanic action among those rocks, but that there is positive 

 evidence to the contrary. It is also held that the reason given by Dr. Schmidt, 



