Dr. Justin Stroup – Assistant Professor SUNY Oswego
“Understanding the Little Ice Age from the perspective of the Tropics: insights from Quelccaya Ice Cap, Peru”
Quelccaya Ice Cap, located in southeastern Peru, is a valuable site for understanding late Holocene climate conditions. At this site, there is an annual resolution ice core record which extends back ~1800 years (e.g., Thompson et al., 2013) and a landscape that records many fluctuations in past ice cap size. Here, we present a detailed record of late Holocene QIC fluctuations using 10Be-dated moraines in the Qori Kalis valley along with a suite of proxy data from lake sediment cores to provide new paleoclimate information. These data sets allow for interpretations about the sensitivity of tropical glaciers to changes in climate. Comparison between past QIC extents and the ice core record of net accumulation demonstrates that temperature was a dominant control on glacial fluctuations during the late Holocene. Our work also provides information about late Holocene climate change (the “Little Ice Age”). It supports hypothesized climate mechanisms such as changes in solar irradiance and volcanism that would influence global cooling and suggests that during the late Holocene the tropics responded to climate changes rather than initiating them. This work highlights the value of using a suite of proxy data from lake sediment cores, linked with surficial deposits and ice core data from the same ice mass.
Prof. Stroup is an Assistant Professor at SUNY Oswego.
Kyle Makovsky – (Doctoral Candidate) Syracuse University
Rockin’ the Bakken - Life and times of a Wellsite Geologist in North Dakota
Oil production began in the Williston Basin nearly 70 years ago with discoveries of oil in the Interlake Formation and soon thereafter in the Madison Group (Lodgepole-Mission Canyon-Charles Formations). More recently, production exponentially ramped up after an assessment from the USGS in 2008 estimated there were nearly 3,645 million barrels of recoverable oil contained primarily in the Devonian-Mississippian Bakken Formation. The Bakken Formation is known as an unconventional resource because unlike conventional systems, the Bakken is the source, reservoir, trap, and seal for oil accumulation. This brought the realization that new technologies would need to be developed to economically extract this resource.
Improvements in horizontal drilling allowed for the rapid development of the Bakken Formation. Along with these improvements, the need arose to accurately determine wellbore placement in real-time based on geologic datum. This is primarily achieved through what is colloquially known in the Oil Industry as Geosteering. This method utilizes data derived from the wellbore in real-time while drilling and allows for accurate determinations of wellbore position in 3D space. It also allows geologists to make an interpretation of where the wellbore is located within the formation and the formation inclination (i.e., dip). This information is critical to the correct placement of the wellbore, thereby minimizing drilling and completion costs while ultimately maximizing production. This talk will focus primarily on the basics of drilling, how data is collected, how this data is used to make geologic interpretations, and finally how these interpretations are used to make real-time decisions to efficiently make hole.
Speaker to be determined
Topic to be announced
Dr. Page Quinton - SUNY Potsdam
Carbon isotopes in shallow epicontinental seas: lessons from the Late Ordovician
Carbon isotopic ratios recorded in marine carbonates are a useful tool for identifying ancient perturbations in the global carbon cycle and are widely used in chemostratigraphic and paleoclimatic studies. These applications work because the net burial/oxidation of organic carbon shifts the carbon isotopic composition of the surface ocean, and these changes can be preserved in marine carbonates. However, records from rocks deposited in epeiric seas present challenges for these types of applications. In particular, net primary productivity, terrestrial organic matter, freshwater input, meteoric diagenesis, and carbonate precipitation/weathering operating at local and regional scales can influence recorded carbon isotopic values in these shallow water settings. We will examine the Late Ordovician carbon isotopic record of eastern North America to discuss some of these effects and I will propose a sequence stratigraphic model for predicting when carbon isotopic records have been influenced by these local/regional process.
Dr. Page Quinton received her Ph.D. from the University of Missouri in 2016 and now is an Assistant Professor of Geology at SUNY Potsdam. Her research focuses on understanding and documenting climate change in the geologic past. By embracing a multidisciplinary approach using stable isotope geochemistry (oxygen and carbon), micropaleontology, and sedimentology she attempts to relate changes in global climate to perturbations in the global carbon cycle and major mass extinction events in deep time intervals (e.g. the Ordovician, Permian-Triassic boundary, and Cretaceous-Paleogene boundary).
David A.V. Eckhardt, U.S. Geological Survey (retired)
Tanzania, in East Africa, has an urgent need to develop sustainable supplies of potable drinking water. Much of the water for the capital region of Dar-es-Salaam is derived from reservoirs that suffer problems in water quality and distribution. A significant ground-water resource is available in an aquifer system that extends southward from the capital, beneath the coastal plain adjacent to the Indian Ocean. Initially, two exploratory test wells showed that the deep, confined unconsolidated aquifer deposits can provide good yields of potable water, but additional exploratory wells would be required before extensive development could proceed. International funding was provided to the Tanzanian government through the World Bank for drilling six more test wells for long-term aquifer monitoring, and for two supply wells. Oversight for the drilling project was provided by an independent consulting group, within which Dave was invited to participate.
This presentation describes the water-well drilling program, with its many technical and logistical difficulties, and some of the outcomes. Also, the presentation will give a cultural overview of Tanzania and its people, as well as a display of some of the natural resources and wildlife of East Africa.
-- B.S degree in Geological Sciences from Lehigh University,
-- M.S. degree in Forest Hydrology from West Virginia University, and
-- PhD degree in Environmental Science from Cornell University.
During his career with the U.S. Geological Survey, from 1974 through 2011, Dave focused on water-quality studies, mainly in the ground-water domain. He worked on regional water assessments in Pennsylvania, Long Island, and upstate New York, with special assignments to the Grand Canyon Environmental Sciences Group in Arizona, the National Park Service, and the U.S. Environmental Protection Agency. In 2012, after 37 years with the USGS, he retired from the Ithaca NY office and became a private consultant (very part-time), where he provides technical assistance to the USEPA Superfund Program. During 2013-14, Dave participated in a regional water-well drilling program in Tanzania, which is the focus of his presentation.