Measuring Rhizocarpon Geographicum lichen Summer Snow & Ice Measurements Measuring Screening by Mountainous Terrain Using Soils of Relative Age-Dating Supraglacial Debris, Twin Glacier , 16 Jul 1978 Atigun Pass, TAPS, and Grizzly Glacer Surveyed x,y,z Control, Pika Rock Glacier Surveyed 1979-80 Profile of Marmot Glacier Collecting Tree Cores at Treeline Brooks Range Publications 1987     Distribution and activity of rock glaciers, central Brooks Range, Alaska (L.A. Haworth, P.E. Calkin, and J.M. Ellis) in Giardino, J.R., J.F. Schroder, and J.D. Viteck, eds., Rock Glaciers, Allen & Urwin, Boston, p. 65-82. 1986     Direct measurement of lichen growth in the central Brooks Range, Alaska, USA and its application to lichenometric dating (L.A. Haworth, P.E. Calkin, and J.M. Ellis): Arctic and Alpine Research, v. 18, no. 3, p. 289-296. 1985     Cirque glacier regime and Neoglaciation, Brooks Range, Alaska (P.E. Calkin, J.M. Ellis, L.A. Haworth, P.E. Burns): Zeitschrift fur Gletscherkunde and Glazialgeologie, v. 21, no.1, 8 p. 1984     Chronology of Holocene glaciation, central Brooks Range, Alaska (J.M. Ellis and P.E. Calkin): Geological Society of America Bulletin, v. 95, p. 897-912. 1983     Guide to Grizzly Glacier and Jaeger and Pika Rock Glaciers, Atigun Pass area (J.M. Ellis, P.E. Calkin, M.P. Bruin, and L.A. Haworth) in Brown, I. and R. Krieg, eds., Guidebook 4- Fourth International Conference on Permafrost, July 18-22, 1983, University of Alaska, Alaska Division of Geology and Geophysical Surveys, p. 154-159.             Environments and soils of Holocene moraines and rock glaciers, central Brooks Range, Alaska (J.M. Ellis and P.E. Calkin), in Evenson, E.B., Ch. Schluchter, and J. Rabassa, eds., Tills and Related Deposits (Genesis/Petrology/Application/Stratigraphy): A.A. Balkema, Rotterdam, p. 315-328 1982     Holocene glaciation of the central Brooks Range, Alaska: Ph.D. dissertation, State University of New York at Buffalo, 396 p.             Development and application of a lichenometric dating curve, Brooks Range, Alaska (P.E. Calkin and J.M. Ellis), in Mahaney, W.C., ed., Quaternary Dating Methods: Milo Dowden, Stroudsberg, Pennsylvania, p. 227-246.             Holocene glacial chronology of the Brooks Range, northern Alaska (P.E. Calkin and J.M. Ellis) In Karlen, W., ed., Holocene Glaciers: Striae (Uppsala, Sweden), v. 18, p. 3-8. 1981     Holocene glaciation of the Arrigetch Peaks, Brooks Range, Alaska (J.M. Ellis, P.E. Calkin, and T.D. Hamilton): Arctic, v. 34, no. 2, p.158-169.             A cirque glacier chronology based on emergent lichens and mosses (P.E. Calkin and J.M. Ellis): Journal of Glaciology, v. 27, no. 97, p. 511-515. 1980     A lichenometric dating curve and its application to Holocene glacier studies in the central Brooks Range, Alaska (P.E. Calkin and J.M. Ellis): Arctic and Alpine Research, v. 12, no. 3, p. 245-264. 1979     Nature and distribution of glaciers, Neoglacial moraines, and rock glaciers, east-central Brooks Range, Alaska (J.M. Ellis and P.E. Calkin): Arctic and Alpine Research, v. 11, no. 4, p. 403-420. 1978      Neoglaciation of the Atigun Pass area, east-central Brooks Range, northern Alaska: M.A. thesis, State University of New York at Buffalo, 113 p. 18 Abstracts published between 1978 and 1984 on Brooks Range glacial geology and Holocene glacial history.