Geography, Geology and the Environment
Explore this Section
- / Faculty of Natural Sciences /
- School of Geography, Geology and the Environment /
- Our Staff /
- Steven Rogers
Dr Steven Rogers
|Phone:||+44 (0) 1782 733752|
|Location:||William Smith : WS1.33a|
|Role:||Teaching Fellow in Geology
Examinations Officer : Geology and Geoscience
I arrived at Keele in 2005 enrolled for the single honours Earth System Science degree, within two years I transferred to the undergraduate Master course; MGeoscience. I graduated in 2009 and briefly worked as an Irrigation and Water Engineer before returning to Keele appointed as a Teaching Fellow in Geology. I teach on several first year modules and several second and third year modules. My teaching mainly involves general geological skills, structural geology, sedimentology and basin dynamics. My research interests currently revolve around carbonate mounds, their palaeoecology, sedimentation, geochemistry and formation. I also love anything 422.9 – 418.7 Ma.
I am a member of the Basin Dynamics Research Group (BDRG) here at Keele and I am affiliated to: The Geological Society of London (Fellow); The Linnean Society of London (Fellow) and The Palaeontological Association.
Pennsylvanian carbonate mud mounds from the sub-aerial to sub-marine transition along a tilted foreland basin, Cantabrian Mountains, Spain.
Supervisors : Dr Michael Montenari, Professor Graham Williams
Carbonate mud mounds from the Pennsylvanian aged San Emiliano Formation (Cantabrian Mountains, Spain) are commonly well exposed. The mounds range from 2 to 50 m in height and were observed to be primary geological features.
Microfacies, ultrafacies, palaeontological and geochemical studies have revealed the composition of the mounds and surrounding carbonates. The factors and controls of mound nucleation, growth and demise have been established. The mounds are skeletal-microbial pack-wackestones. Peloidal, homogenous and clotted micrites are the main sedimentological constituents of the mounds.
Microfossils are dominant with Donezella, Claracrusta, Rothpletzella and Girvanella being common. Small foraminifera, bryozoans, corals and algae are all present within the mounds, but are more common within off-mound carbonates. The mounds show evidence of deposition within shallow water environments, which may have been periodically sub-aerially exposed.
The formation of the mounds was controlled by a dynamic relationship between Donezellacean algae, and microscopic encrusters. Fluctuating environmental conditions lead to the alternate dominance between the two groups, resulting in accretion and stabilisation of carbonate muds. Off-mound carbonate sediments generally show more evidence for deeper, and in some cases, higher energy environment of deposition. These carbonates are generally packstones, and two distinct types occur: a Donezella dominated carbonate with ooids, and a cyclical micrite-marl sequence which is dominated by ‘phylloid’ algae, bryozoans and corals.
Comparable mounds from the Lois-Cigüera Formation, of the local Bernesga Valley, were deposited in a deeper environment. A relationship between Donezella, Claracrusta, Rothpletzella and Girvanella was not observed within the mounds of the Lois-Cigüera Formation. These mounds are compositionally different to their San Emiliano counter-parts. The San Emiliano Fm. was deposited on the sub-aerial to sub-marine transition on a tilted foreland basin. Carbonate and mound deposition took place within a basin during periods of heightened tectonic activity. Carbonates of the San Emiliano Fm. were originally aragonitic. Three new fossil species are presented.
- Doherty, H., Ferriday, T., Kelly, M., Montenari, M., Rogers, S. L., Williams, G. D. (2010). The Cantabrian Thrust Belt: basin history of the North Gondwana passive margin – rifting, glaciations? More rifting and collision. Tectonic Studies Group Annual Meeting , Birmingham University 2010
- Rogers, S. L. 2009. Palaeoecological and spatial facies analysis of the ‘event horizons’ at the Whitcliffe GSSP, Ludlow, Shropshire, UK. Unpubl. MSc-Thesis, Keele University
- Rogers, S. L. 2010. Mud-mounds: What, Where, Why and When. Keele Research Symposium, Keele University 2010
- Rogers, S. L. and Montenari, M. 2012. Tuberitinidae Miklukho-Maclay, 1958: life cycle, ecology, diagenesis. Geophysical Research Abstracts. Vol. 14, EGU2012-331. See EGU 2012 Abstract and EGU 2012 poster
- ESC-10034 Time and Space
- ESC-10045 Introductory Geology for the Environmental Sciences (Module Coordinator)
- ESC-10055 Sedimentology and Palaeontology
- ESC-20039 Advanced Structural Geology and Geological Mapping Training (Module Coordinator)
- ESC-30008 Structural Geology and Geodynamics
Year 4 (MGeoscience)
- ESC-40004/5/6 MGeoscience Research Project