Presentation on theme: "Private John Imbrie, age 19, cleaning his Browning Automatic Rifle in April 1945, a few hours before seriously wounded from a German artillery shell."— Presentation transcript:
1Private John Imbrie, age 19, cleaning his Browning Automatic Rifle in April 1945, a few hours before seriously wounded from a German artillery shell.
2BRACHIOPODS OF THE TRAVERSE GROUP (DEVONIAN) OF MICHIGAN Part 1 BRACHIOPODS OF THE TRAVERSE GROUP (DEVONIAN) OF MICHIGAN Part 1. Dalmanellacea, Pentameracea, Strophomenacea, Orthotetacea, Chonetacea, and Productacea Bull. AMNH, vol. 116, 1959
3BIOMETRICAL METHODS IN THE STUDY OF INVERTEBRATE FOSSILS Bull BIOMETRICAL METHODS IN THE STUDY OF INVERTEBRATE FOSSILS Bull. AMNH, vol. 108, 1956
4Regression lines AE (y on x), DK (x on y), BF (major axis),CH (reduced major axis)From Imbrie, 1956, p. 231
5RMA curves display same growth patterns but only size difference fortwo subspeciesof P. gracilis:P. g. gracilis &P. g. nanus.
6Slight but statistically significant differences in RMA growth curves justify recognition of four subspeciesof Strophodonta extenuata: extenuata, rockportensis, ferronensis, and bellensis.
11Florena fossils from whole section Florena fossils from whole section. Each plotted to different scale (AAPG Bull., 1955, p. 660).
12Cottonwood thin-section point counts;12 taxa from 7 localities (GSA Bull., 1962, p. 528).
13Succession of ice ages in Caribbean core A according to D. Ericson (forams) and to C. Emiliani (oxygen isotopes). General agreement in upper parts of the core, but results in older part did not agree. (Imbrie & Imbrie, p. 132.)
14First demonstration that multiple-factor analysis could produce promising if not yet completely dependable results correlating deep-sea data with Milankovitch cycles. (in Late Glacial Ages, Yale Univ. Press, p , 1971, K. Turekian, ed.)
15Curves for E (eccentricity), T (tilt), and P (precession) over last 800,000 years.
16This graph confirmed many predictions of the Milankovitch theory (data from Hays, Imbrie, Shackelton, Science,1976)
17Climate of last half-million years from isotopic data from two Indian Ocean cores by CLIMAP research group reflecting variations in global ice volume, further confirming Milankovitch theory of the ice ages (Imbrie & Imbrie, p. 169).
20Imbrie’s Honors, Awards, and Prizes National Academy of Sciences, 1978MacArthur Prize Fellowship, 1981American Philosophical Society, 1981William Smith Lecturer, Geological Society London, 1984Maurice Ewing Medal in Geophysics, AGU/USN, 1986University of Edinburgh, Sc.D.,1989Leopold von Buch Medal, German Geol. Soc., 1990Twenhofel Medal, SEPM, 1991Lyell Medal, Geol. Soc. London, 1991Christian-Albrechts University of Kiel, Sc.D., 1993Vetlesen Prize, 1996Swedish Society of Anthropology and Geography, 1999
21John Imbrie’s Credo“The overwhelming advantage of quantitative techniques, however, lies in this: that numerical data materially facilitate the task of synthesizing complex observations on biofacies widely distributed in time and space.”Biofacies Analysis, in Crust of the Earth, GSA Special Paper 62, 1955, p. 459.(April 2001)