|Impact Craters and Shales|
|Things Microbial||Summer 2000 Field Work|
Shales and mudstones are very fine grained terrigenous clastic sedimentary rocks, and
they constitute approximately two-thirds of all sediments on earth. Even though a major
share of the earth's sedimentary record and thus its history is recorded in them, shales
and mudstones have been studied very little because of their fine grain size. Recent
research has demonstrated that a lot of valuable information can be extracted from shales
and mudstones, pertaining to ancient environments, climates, ocean circulation, and the
history of life.
Further studies will be beneficial to the solution of engineering problems associated with ground movements in the construction of roads and houses as these are often linked to underlying shale and mudstone formations. Also, shales and mudstones are the primary source of hydrocarbons, and better understanding of these materials, their composition, and the forces that bind them may be helpful in the search for energy resources for the future.
Shales ... the final frontier of sedimentary geology. (click for information on current research projects)
|On these pages you will have an opportunity to learn about ongoing research projects by my students and myself. Projects we are working on include an extensive study of the Late Devonian Chattanooga Shale of Tennessee and adjacent areas (New Albany Shale, Ohio Shale). Aspects of this study are: sequence stratigraphy of the Chattanooga Shale, basin analysis, shale facies, depositional environments, tracing of erosion surfaces and hiatuses, petrography, and a study of bioturbation. In the process we have also found a very interesting suite of diagenetic sedimentary grains (silica fills in Tasmanites cysts, pyrite spheres, pyrite ooids, phosphate grains) that are important components of lag deposits on erosion surfaces and sequence boundaries. In the Shale Photo pages that are linked to this page you can currently see pictures of pyrite ooids, silica filled cysts, sedimentary structures, shale microfabrics, microbial mat features, and bioturbation in shales. Other shales and mudstones we are investigating are part of the Green River Formation (Eocene), the Posidonia Shale (Jurassic), the Belt Series (Proterozoic), the Moenkopi Formation (Triassic), the Blackhawk Formation and Mancos Shale (Cretaceous), and of Pennsylvanian cyclothems in the Fort Worth Basin.|
|Hatch Mesa, a southern outlier of the Book Cliffs of central Utah. The exposed sediments are interbedded sandstones and shales of the Cretaceous Blackhawk Formation.||
....Behold the Power of Mud ! ! !
Sites of Interest for Shale Enthusiasts
|Shale Royalty: The Burgess Shale||Oil Shale Journal||New Albany Shale, Indiana||Australien Oil Shale Plant|
|Gas Research Institute|
It is uphill all the way, and there are no shortcuts.
firstname.lastname@example.org (click to send me mail)
© Jürgen Schieber, UTA Department of Geology
Last updated: March 12, 2001.
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