On the relative and absolute ages of seven lunar front face basins: II. From the Crater Counts |
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| Institution: | 1. Department of Medicine – DIMED, University of Padova, Italy;2. Comprehensive Biomarker Center GmbH, Heidelberg, Germany;3. UOC Immunotrasfusionale, University-Hospital of Padova, Italy;4. Eurofins Medigenomix GmbH, Ebersberg, Germany;5. Department of Cardiology, Angiology, and Pulmonology, University Hospital Heidelberg, Heidelberg, Germany;1. Department of internal medicine, Amsterdam VU University Medical Center, Amsterdam, The Netherlands;2. Department of Public Health & Primary Care, Leiden University Medical Center, Leiden, The Netherlands;3. Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands;4. JJ van Rood Center for Clinical Transfusion Research, Sanquin Research, Leiden, The Netherlands;1. School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, United States of America;2. Southwest Research Institute, Boulder, CO, United States of America;1. Department of Biochemistry, University of Turku, Turku, Finland;2. Turku University Hospital, Department of Medicine, Turku, Finland |
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| Abstract: | From counts of postbasin craters larger than 30 km in diameter, lying within or near to seven giant front face lunar basins, relative ages for the basins may be obtained. These relative ages correlate well with absolute basin ages found from viscosity arguments in R. B. Baldwin (1987, Icarus 70, □□□-□□□). From crater counts the basins are in the following sequence of increasing relative age: Orientale, Imbrium, Crisium, Serenitatis, Nectaris, Humorum, and the unnamed basin lying between Werner and the Altai ring. The absolute ages from Baldwin (1987) range from 3.80 to 4.30 × 109 years while a correlation with the relative ages of this paper yields a range of 3.79 to 4.27 × 109 years. The discrepancy is largely due to Serenitatis where the debris from Imbrium has presumably buried some post-Serenitatis craters. From both sets of data there is no evidence that a “Terminal Lunar Cataclysm” ever occured. |
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