Moon in the middle of the Imbrian Period

Moon in the middle of the Imbrian Period

C004/3887 Rights Managed

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This image is part of the sequence Space: Imbrian lunar geology

Credit: LIBRARY OF CONGRESS, GEOGRAPHY AND MAP DIVISION/SCIENCE PHOTO LIBRARY

Caption: Moon in the middle of the Imbrian Period. This image of the Moon combines data obtained using remote-sensing equipment, with geologic and artistic interpretations to show the Moon as it looked 4 billion years ago (middle of the Imbrian Period). This is part of a sequence showing the Moon as it looked 3.3 billion years ago (end of the Imbrian Period, C004/3886) and today (C004/3885). The Imbrian Period was when the Imbrium and Orientale impact basins formed, before which (as seen here) the Moon lacked large lava plains (maria). This work was done by Don E. Wilhelms and Donald E. Davis, and published by the US Geological Survey in 1971.

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Keywords: 1900s, 1971, 20th century, artwork, astronomical, astronomy, circle, circular, crater, craters, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, davis, don e. wilhelms, donald e. davis, formation, forming, geological history, geology, geomorphology, historical, history, illustration, imbrian period, imbrium impact basin, impact basins, lava, lunar, map, mare, maria, molten, moon, orientale impact basin, planetary science, prehistoric, prehistory, rocky, round, selenographical, selenography, selenological, selenology, sequence, series, solar system, space, us geological survey, usgs, wilhelms

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