Upper Imbrian
Upper Imbrian Periods of Lunar geologic time : Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernician In the Lunar geologic ...
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Lower Imbrian
Lower Imbrian Periods of Lunar geologic time : Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernician In the Lunar geologic timescale, the Lower Imbrian epoch occurred between 3850 million years ...
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Geologic time scale
... Geologists tend to talk in terms of Upper/Late, Lower/Early and Middle parts of periods and other units -- e.g. "Upper Jurassic", "Middle Cambrian". Because geologic units occurring ... hippo size) 65.5±0.3 * Mesozoic Cretaceous Upper/Late Flowering plants appear, along with new ... Early 145.5 ± 4.0 Jurassic Upper/Late Gymnosperms (especially conifers, Bennettitales and cycads ... Early 199.6 ± 0.6 Triassic Upper/Late Archosaurs dominant and diverse on ...
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Geology of the Moon
... sank. Less dense feldspar located in the upper part of the magma formed mountains, giving ... continued up to the end of the Upper Imbrian epoch, about 3,200 million years ago ... the Moon, particularly the largest basins, the upper crust to a depth of several kilometers ... iron and magnesium than is normal for upper crust rocks. Regolith The surface of ...
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Lunar geologic timescale
... Eratosthenian Period : 3200 MY to 1100 MY Upper Imbrian Epoch : 3800 MY to 3200 MY Lower Imbrian Epoch : 3850 MY to 3800 MY Nectarian ... time scale was developed are basalts of Imbrian age. Samples from before and after this ... Nectarian materials. These deposits are called Pre-Imbrian age materials, which encompasses both time ...
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Nectarian
... Lunar geologic time : Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernician The Nectarian Period of the ... impact event. Ejecta from Nectaris forms the upper part of the densely cratered terrain found ... Hadean eon Cryptic Basin Groups Nectarian Lower Imbrian
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List of astronomical topics
... Dyson, Freeman E E-type asteroid Early Imbrian Earth Earth atmosphere Earth impacts Earth's ... Iapetus (moon) IAU Icy moon Ijiraq (moon) Imbrian Immanuel Kant Impact basin Impact event Inclination ... ray binaries Lowell Observatory Lowell, Percival [[ Lower Imbrian Lucky imaging Luminance Luminiferous aether Luminosity Luminosity ... United States Naval Observatory Unmanned space mission Upper Imbrian Uppsala Astronomical Observatory Uppsala General Catalogue ...
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Eratosthenian
... Lunar geologic time : Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernician The Eratosthenian period in the ... Period. The massive basaltic volcanism of the Imbrian period tapered off and ceased during this ...
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Category:Lunar geologic periods
... Eratosthenian G Lunar geologic timescale L Lower Imbrian N Nectarian P Pre-Nectarian U Upper Imbrian
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Pre-Nectarian
... Lunar geologic time : Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernician The Pre-Nectarian Period of ...
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