02182nas a2200229   4500008004100000245013200041210006900173260001200242300001200254490000700266520142800273653003901701653001201740653001901752653001601771653002801787100002401815700002401839700002401863700002201887856004301909       2016                        eng d00aAn anisotropy of magnetic susceptibility (AMS) investigation of the till fabric of drumlins: support for an accretionary origin0 aanisotropy of magnetic susceptibility AMS investigation of the t  c09/2015  a100-1080 v453 a<div class="para">
<p>This paper describes the results of a spatially dense anisotropy of magnetic susceptibility (AMS) till fabric study of a single drumlin in the Weedsport Drumlin Field, New York State, USA. AMS till fabrics provide a robust, quantitative and unbiased approach to assess subglacial till kinematics and infer ice-flow dynamics. The drumlin selected for this detailed investigation was systematically sampled at 18 locations to evaluate the patterns of ice flow and associated till kinematics within a drumlin and to test erosional vs. depositional models for its formation. AMS till fabric analysis yielded strong fabrics that increase in strength towards the drumlin crest, indicating that bed deformation occurred during till deposition and that deformation within the drumlin was greater than that in the interdrumlin low. Fabric orientations reveal drumlin convergent, divergent and parallel ice-flow paths that illustrate a complex interaction between ice flow and the drumlin form; fabric strength and shape reveal systematic differences in bed deformation between the interdrumlin and drumlin regions. These observations are inconsistent with purely erosional models of drumlin genesis; instead, these observations are more consistent with syndepositional streamlining of till transported, probably locally as a deforming bed, from the interdrumlin low towards the drumlin locality.</p>
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10aanisotropy magnetic susceptibility10adrumlin10aNew York state10atill fabric10aWeedsport Drumlin Field1 aHopkins, Nathan, R.1 aEvenson, Edward, B.1 aKodama, Kenneth, P.1 aKozlowski, A., L.  uhttp://doi.wiley.com/10.1111/bor.12138