Browsing by Subject "microfossils"
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Item Letter to Duncan McConnell from H.B. Stenzel on 1947-09-29(1947-09-29) Stenzel, H.B.Item Letter to E.J. Smith, Jr. from H.B. Stenzel on 1939-08-08(1939-08-08) Stenzel, Henryk B.Item Letter to H.B. Stenzel from Bill Berggren on 1958-01-11(1958-01-11) Berggren, William A.Item Letter to H.B. Stenzel from Cesare Emiliani on 1951-10-23(1951-10-23) Emiliani, CesareItem Letter to H.B. Stenzel from Dan E. Feray on 1951-12-17(1951-12-17) Feray, Dan E.Item Letter to H.B. Stenzel from Duncan McConnell on 1947-09-18(1947-09-18) McConnell, DuncanItem Letter to H.B. Stenzel from E.H. Sellards on 1942-12-02(1942-12-02) Sellards, E.H.Item Letter to H.B. Stenzel from John Emery Adams on 1928-04-11(1928-04-11) Adams, John EmeryItem Letter to H.B. Stenzel from John Emery Adams on 1931-06-12(1931-06-12) Adams, John EmeryItem Letter to H.B. Stenzel from John S. Cruse, Jr. on 1949-12-06(1949-12-06) Cruse, John S. , Jr.Item Letter to H.B. Stenzel from Keith Young on 1962-07-10(1962-07-10) Young, KeithItem Letter to H.B. Stenzel from M.B. Stephenson on 1944-06-24(1944-06-24) Stephenson, M.B.Item Letter to Henryk B. Stenzel from Elso S. Barghoorn on 1950-05-10(1950-05-10) Barghoorn, Elso S.Item Letter to Hubert G. Schenck from H.B. Stenzel on 1942-12-22(1942-12-22) Stenzel, Henryk B.Item Letter to J.P.D. Hull from James A. Waters on 1944-03-04(1944-03-04) Waters, James A.Item Letter to M.B. Stephenson from H.B. Stenzel on 1944-06-26(1944-06-26) Stenzel, Henryk B.Item Letter to Morris K. Jacobson from H.B. Stenzel on 1944-03-07(1944-03-07) Stenzel, H.B.Item Letter to R.Dana Russell from H.H. Rainwater on 1958-01-07(1958-01-07) Rainwater, H.H.Item Use of Mineralogy and Fossils in Identifying Aggregate Sources(2009-05-04) Patty, Tom S.The state of Texas has a wide variety of rock formations from which immense volumes of crushed stone and gravel are transported annually to various types of construction projects. The development and expansion of transportation modes over the past 60 years, such as interstate highways, state and federal roadways, and intercoastal canals, have provided the means of moving industrial mineral and aggregates to construction sites across the State. Petrographic examinations indicate that quarried stone deposits and sand and gravel pits tend to have unique mineral suites and/or microfossils that can provide a "fingerprint" for each deposit. Unique indentifications of the most commonly used constructional aggregates can enable the tracing of a given aggregate material to a specific geologic source. Identifiable mineral and microfossil constituents of constructional aggregates have been used to definitively pinpoint a material's origin with a degree of certainty that has allowed the resolution of performance claims or disputes involving concrete placements. Such microscopical features have been used effectively to give expert testimony on the origins of physical evidence in civil and criminal litigation cases.