Andrew L. Kozlowski

AMS RADIOCARBON DATES FROM PLEISTOCENE AND HOLOCENE MAMMALS HOUSED IN THE NEW YORK STATE MUSEUM, ALBANY, NEW YORK, USA

To obtain the appropriate samples, the preparation procedures generally follow Brown et al. (1988) and Bronk Ramsey et al. (2004). Samples were first decalcified using 0.5N HCl to obtain collagen, generally for 24–48 hr. Once decalcified, collagen was then gelatinized at 58 C for 16 hr. Afterwards, the gelatin solution was filtered to remove any remaining solids. The solution was then ultrafiltered to remove the 30-kD fraction, which was then lyophilized. In general, lyophilized collagen appeared similar to a white cotton ball. Graphitization and analysis were conducted at the National Oceanic Sciences Accelerator Mass Spectrometry (NOSAMS) facility. All dates were calibrated using the online CALIB 5.0.2 program (Stuiver et al. 2005). The calibrated dates reported below represent the 2-age range.

A new record of ringed seal (Pusa hispida) from the late Pleistocene Champlain Sea and comments on its age and paleoenvironment

The Champlain Sea, the most recent interior seaway of northeastern North America, resulted from late Pleistocene recession of the Laurentide Ice Sheet (LIS) and subsequent isostatic depression of the Champlain and St. Lawrence valleys (Gadd, 1988; Rayburn et al., 2007; Cronin et al., 2008, 2012). This sea existed for about 4000 years, from 13.1 to 9.0 ka (Cronin et al., 2008), and Champlain Sea sediments contain abundant marine microfauna (e.g., foraminifera, ostracods; Cronin, 1988; Hunt and Rathburn, 1988) and macrofauna (e.g., bivalves, mammals; Harington, 1988; McAllister et al., 1988; Rodrigues, 1988). Here we report the discovery of a new specimen of phocid seal from southern Champlain Sea sediments (Fig. 1), and its age. We also report the age of a previously described Phoca vitulina (harbor seal) from a nearby locality (Ray, 1983), and discuss the paleoenvironmental implications of the geographic location and ages of these two phocid specimens. Institutional Abbreviations—AMNH, American Museum of Natural History, New York, New York; NYSM, New York State Museum, Albany, New York; NOSAMS, National Ocean Sciences Accelerator Mass Spectrometry Facility; SUNY, State University of New York.

THE GREAT GULLY GROUP: A TIME-STRATIGRAPHIC FRAMEWORK FOR LATE QUATERNARY EVENTS IN THE CENTRAL FINGER LAKES OF NEW YORK STATE

The Finger Lakes region of central New York has long been recognized as an iconic landscape most recently refined by the Ontario Lobe of the Laurentide Ice Sheet. The earlier record of glacial events and the actual age of formation of the Finger Lakes has been studied less and thus are not well known. Detailed geologic field mapping by the New York State Geological Survey as part of an ongoing STATEMAP and Great Lakes Geological Mapping Coalition project has provided the resources to investigate and establish a detailed lithostratigraphic and chronostratigraphic record for deeply buried sediment packages within Great Gully, an expansive east-west oriented gorge on the eastern flanks of the Cayuga Lake near the village of Union Springs in Cayuga County. Identification of laterally continuous and distinct lithologic units observed from 16 exposures has allowed us to develop a comprehensive type section and confidently assign formal names at the formation and member level lithostratigraphic hierarchy. Newly collected continuous wire-line cores, 50 meters in depth, substantiate continuity and expand the stratigraphic and spatial range of preserved deposits. (continued on back) Speaker: Dr. Andrew L. Kozlowski, New York State Museum February 15, 2017 F E B R U A R Y M E E T I N G About the Presenter: Dr. Kozlowski is a native of Cortland and received his undergraduate degree from SUNY Cortland in 1995, and his MS in hydrogeology and Ph.D in glacial geology from Western Michigan University in 1998 and 2004, respectively. Dr. Kozlowski is the Director of the NY Geologic Mapping Program and the NY State Museum Curator for Quaternary Landscape Materials. His research focus utilizes geologic mapping of surficial deposits, primarily glacial in origin to address, societal and land use issues. Specifically his work directing the geologic mapping program in the state museum has focused on understanding sediment – landform relationships to address geologic hazards such as landslides, water quality & resources, and aggregate resources, etc. In pursuit of this objective his long term goal is to develop a better understanding of three-dimensional geologic frameworks of glacial deposits that provide better understanding and resolution of glacial stratigraphy and glacial chronology in New York State. Dinner Sponsors receive free dinner, a display table set up for the social hour and a 5 minute presentation to the dinner audience, prior to the presentation. Please contact Jesse Vollick at jesse.vollick@obg.com for more information. Reservations are required by Monday February 13, 2017 Whether attending the dinner or only the presentation. Register on-line at www.hmpga.org Call or email Marie Cole at (518) 724-7254 • marie.cole@obg.com Location: Century House 997 New Loudon Road Latham, NY 12110 Time: Social Hour 5:00pm Dinner 6:00pm Program 7:00pm Cost:

Fast flow of the Lake Michigan Lobe: evidence from sediment-landform assemblages in southwestern Michigan, USA

10.00 for student members

Outburst flood origin of the Central Kalamazoo River Valley, Michigan, USA

20.00 for dormant geologists

Megaflooding on Earth and Mars: Proglacial megaflooding along the margins of the Laurentide Ice Sheet

25.00 for members

Exploring till bed kinematics using AMS magnetic fabrics and pebble fabrics: the Weedsport drumlin field, New York State, USA

30.00 for non-members program only: Free Abstract (con’d): Lithostratigraphic units are comprised of alternating packages of diamicton and fluvial\lacustrine facies. The fortuitous abundance of subtill organics provides a metric to establish a robust, internally consistent radiocarbon chronology and assess paleoenvironmental conditions. Strata older than the limits of radiocarbon are constrained by optically stimulated luminescence dating. Together the combined geochronology and lithostratigraphic information provide a unique basis for a chronostratigraphic record of glacial and non-glacial phases in the Finger Lakes spanning Marine Isotope Stages (MIS) 1-6 and possibly beyond.