+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Integrating sedimentology, stratigraphy, hydrogeology, and critical thinking through the successive interpretation of subsurface geologic cross sections

, : Integrating sedimentology, stratigraphy, hydrogeology, and critical thinking through the successive interpretation of subsurface geologic cross sections. Geological Society of America 41.7

In a two-course sequence beginning with Sedimentology and Stratigraphy followed by Hydrogeology, students construct and interpret geologic cross sections using contrasting approaches and progressive sets of constraints. During this process, the students develop important geologic skills and are encouraged to employ the concept of multiple working hypotheses. In the first semester, students work in teams to construct structural cross sections using borehole and natural gamma logs from a local groundwater contamination site. Students learn how to lay out a section line, choose a datum elevation, deal with vertical exaggeration, and hang wells on the cross section. Students then individually interpret the sections using conventional lithostratigraphic correlation techniques--deciding whether to lump or split lithologic units and how to interpolate between control points. With the students' permission, we post a selection of their completed cross sections on the classroom wall to compare and contrast differing interpretations of the same data set. Discussions involve alternative correlation styles and sedimentary controls on the deposition of the sediments they have interpreted. The activity is extended in Hydrogeology during the subsequent semester. Hydro students annotate uninterpreted cross section templates generated by Sed/Strat students with well screens, static water levels, and contaminant concentration data. Each student is then asked to subdivide the subsurface sediments into aquifer and aquitard units and to correlate these units from well to well. Their objective is to create a hydrostratigraphic interpretation that is constrained by both lithologic and hydrologic information. Again, multiple interpretations are generated and discussed. Students invariably ask which interpretation is right (or which is best), providing an ideal opportunity to discuss the formulation of conceptual geologic models and to illustrate the potential value of using multiple working hypotheses. The experience culminates with a class field trip to the groundwater cleanup site to help students grasp the scale of the problem and to a nearby gravel pit where students can examine sediment exposures and think about implications for correlating lithostratigraphic or hydrostratigraphic units in the subsurface.


Other references

Mukhortova, T.; Gel'-Berg, M., 1978: Morphological analysis of Lavandin bred in the Nikitsk Botanical Garden. Biulleten' ) 68-72

Hamilton, W.J., 1931: Habits of Star-nosed Mole, Condylura cristata. Journal of Mammalogy, 12: 345-355

D.G.oot Hedlin Catherine D.; Constable S.C.; Travis B.J., 1988: Inversion of magnetotelluric sounding data in two dimensions. Abstracts - Workshop on Electromagnetic Induction in the Earth and Moon 9: 53

Arosa, F.A.; de Sousa, M., 1995: Iron differentially modulates the CD4-lck and CD8-lck complexes in resting peripheral blood T-lymphocytes. Clinical and experimental studies performed in situations of iron overload have demonstrated that iron impairs several T-cell functions. We have examined the effect of iron in the form of ferric citrate on the CD4-lck and CD8-lck complexes in view...

Rose, A.J.; Glick, G.C.; Smith, R.L.; Schwartz-Mette, R.A.; Borowski, S.K., 2016: Co-Rumination Exacerbates Stress Generation among Adolescents with Depressive Symptoms. NlmCategory="UNASSIGNED">Through stress generation, individuals' own thoughts and behaviors can actually lead to increases in their experience of stress. Unfortunately, stress generation is especially common among individuals who...

Wondergem, M.J.; Zijlstra, J.M.; de Rooij, M.; Visser, O.J.; Huijgens, P.C.; Zweegman, S., 2012: Improving survival in patients with transformed B cell non Hodgkin lymphoma: consolidation with ⁹⁰Yttrium ibritumomab tiuxetan-BEAM and autologous stem cell transplantation. British Journal of Haematology 157(3): 395-397

Shibata, N.; Morita, K.; Ono, T.; Nishikawa, S.; Kinoshita, M.; Kawakita, S.; Takada, K.; Muranishi, S.; Shimakawa, H., 1988: Effects of diltiazem on rheological properties of human blood. The in vitro effects of diltiazem (DTZ), a coronary vasodilator, deacetyldiltiazem (D-M1), one of the metabolites of DTZ, and pentoxifylline (PTF) which is known to improve erythrocyte deformation, on the viscosity of platelet poor blood were comp...

House, MR.; Gordon, M.; Jr.; Hlavin, WJ., 1986: Late Devonian ammonoids from Ohio and adjacent states. Three late Devonian ammonoid-bearing levels are described from the area of Cleveland, Ohio. These appear to represent the German Platyclymenia, Clymenia and Wocklumeria Stufen, clear evidence for which has been lacking previously in eastern North...

Deriabin, Vi, 1975: Harmfulness of the termite Microtermes problemations Grasse in the conditions of the Yemen Arab Republic and measures of controlling it. Uzbekskii biologicheskii zhurnal: 45-47

Jelsma, J.; Scott, D., 2011: Impact of using the ICF framework as an assessment tool for students in paediatric physiotherapy: a preliminary study. To determine if clinical assessment of children with neurological conditions by physiotherapy students was improved through the overt use of the International Classification of Functioning, Disability and Health (ICF). A retrospective, pragmatic a...