Experience 20years texhing and reserch expireience in geology,enginnering geology for graduate and undergraduate students-reserch guidance,10years field exoireience conducting field camps for geology students=Presently Assistant professor in geolog
Organizations NITK-National Institute of Technology,Surathkal,Mangalore-DK,India
Geology section Dept of Civil Engineering
Publications published 70 reserch papers.( 3 books-1.Engineering Geology for civil Engineers2.Decorative and dimensional stones of India3.Engineering Geology4.under press (commercial Rock Deposits of India)
I have a 14" almost perfectly round rock, found 500 feet underground in a mine. I have been to local rock hound shops but they cannot determine what it is.
Answer Dear Don
Rock ur collected at underground mine site appears to be weathered rock.Original rock under the process of weathering ,alteration and transporation reshaped into rounded to sub rounded.You can see clear marks on fracturing .This rock again will alters and fractures along the visible fracture.
However it is difficult to determine me rock type.It may be weathered granite.You can drop dil Hydrochloric acid-if it reacts it may be limestone/dolomite/marble.
U can remove weathered surface with hammer-it ooks like hard-it may belongs to Igneous rock type
Prof DVREDDY-NITK-INDIAD
Professor of Geology
Editor- in -Chief -Int Journ Earth Sciences&Engineering(ISSN 0974-5904)
Department of Civil Engineering
National Institute of Technology,Surathkal(NITK)
Srinivasanagar-575025,Mangalore-D.K,India
email dvr1952@yahoo.co.in
chiefeditor_ijee@yahoo.com, dvr1952@gmail.com
![](javascript:displayImg('http://z.about.com/w/experts/Geology-1359/2009/07/Freds-rock.jpg','Freds rock','image of 14" unknown rock'))