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Topic: Upper Imbrian

Related Topics

Lower Imbrian

Nectarian

Eratosthenian

Lunar geologic timescale

Copernician

Mare Humboldtianum

Mare Ingenii

Cosmological timeline

Mare Serenitatis

Mare Tranquillitatis

Lunar mare

Geologic time scale

Mesozoic

Exponential timeline

Logarithmic timeline of current events

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	Upper Imbrian (Site not responding. Last check: 2007-10-08)
		German diocese embracing the greater portion of the administrative district of Oberpfalz, and portions of Upper and Lower Bavaria, and Upper Franconia.
		The main goals of this project have been to document Middle and Upper Palaeolithic patterns of lithic reduction, land-use and mobility; and date the Middle-Upper Palaeolithic chronological boundary.
		An overview of the history of the upper Midwest including lay of the land, the Indians, the French, the British, the ordinances, the pineries and the mines.
	www.omniknow.com /common/wiki.php?in=en&term=Upper_Imbrian (1208 words)

	Mare Nectaris
		Mare Nectaris (the "sea of nectar") is a lunar mare located within the Nectaris basin on the lunar nearside.
		The basin material is of the Nectarian and Lower Imbrian epochs, with the mare material of the Upper Imbrian epoch.
		The crater Theophilus on the northeastern side of the mare is of the Eratosthenian epoch.
	www.starrepublic.org /encyclopedia/wikipedia/m/ma/mare_nectaris.html (123 words)

	Upper Hanover Township, Pennsylvania - Encyclopedia Glossary Meaning Explanation Upper Hanover Township, Pennsylvania (Site not responding. Last check: 2007-10-08)
		Upper Hanover Township, Pennsylvania - Encyclopedia Glossary Meaning Explanation Upper Hanover Township, Pennsylvania.
		Upper Hanover Township is a township located in Montgomery County, Pennsylvania.
		Out of the total population, 2.0% of those under the age of 18 and 6.1% of those 65 and older are living below the poverty line.
	encyclopedia-glossary.com /en/Upper-Hanover-Township-Pennsylvania.html (429 words)

	Lower Imbrian (Site not responding. Last check: 2007-10-08)
		In the Lunar geologic timescale, the Lower Imbrian epoch occurred between 3850 million years ago to about 3800 million years ago.
		The impact which created the Mare Imbrium basin occurred at the start of the epoch, and it represents the period during which the newer large basins were formed.
		These filled with basalt largely during the following Upper Imbrian epoch.
	www.1-free-software.com /en/wikipedia/l/lo/lower_imbrian.html (89 words)

	[No title] (Site not responding. Last check: 2007-10-08)
		All craters in this category are assigned an Imbrian age on the basis of rimcrest sharpness and common embayment by Imbrian mare material; however, some craters appear to be superposed on the mare material or gradational with it and could be post-Imbrian.
		Although topographic features are subdued to a degree that would indicate early Imbrian or pre-Imbrian age in main-sequence craters, superposition of the type example on middle or late Imbrian features of the Orientale basin floor suggests relative youth and, therefore, an original form distinct from that of the main-sequence craters.
		Includes craters of two types: (1) those difficult to assign to either the upper or lower Imbrian because of small size, resolution limitations, extensive flooding by younger materials, or proximity to large youthful craters; (2) those whose central peaks and interior profiles are unlike those of main-sequence craters.
	webgis.wr.usgs.gov /downloads/digeol/moon/703/lnrtxt.doc (4236 words)

	mare nubium (Site not responding. Last check: 2007-10-08)
		The actual basin is believed to be of Pre-Nectarian system, with the surrounding basin material being of the Lower Imbrian epoch.
		The mare material is of the Upper Imbrian epoch.
		The crater to the east of the mare is Bullialdus, which is of the Eratosthenian Epoch.
	www.yourencyclopedia.net /Mare_Nubium.html (163 words)

	Upper Imbrian - Wikipedia, the free encyclopedia
		Pre-Nectarian - Nectarian - Lower Imbrian - Upper Imbrian - Eratosthenian - Copernican
		In the Lunar geologic timescale, the Upper Imbrian epoch occurred between 3800 million years ago to about 3200 million years ago.
		It was preceded by the Lower Imbrian period and followed by the Eratosthenian.
	en.wikipedia.org /wiki/Upper_Imbrian (92 words)

	Mare Orientale (Site not responding. Last check: 2007-10-08)
		However, it is the freshest impact basin on the Moon and is believed to be slightly younger than the Imbrium Basin, which formed about 3.85 billion years ago.
		The surrounding basin material is of the Lower Imbrian epoch, with the mare material being of the Upper Imbrian epoch.
		The mare is about 600 miles across and was formed by the impact of an asteroid sized object.
	www.1-free-software.com /en/wikipedia/m/ma/mare_orientale.html (282 words)

	Kep1
		It therefore appears to be Eratosthenian or Upper Imbrian.
		Kepler B is said to be Imbrian due to its degradation.
		Above the upper right horizon one can see a bit of a haze reminiscent of Hoagland’s TOWER seen on III84M.
	www.lunaranomalies.com /kep1.htm (1777 words)

	[No title]
		The upper half of the map portrays the geology of the earth-facing or near side, and the lower half shows terrain that was unknown before spacecraft photography.
		Similar plains of Imbrian age that are distant from the Orientale basin may be ejecta of Imbrium-basin secondary craters or of large Imbrian primary craters.
		In the Imbrian Period, ejecta from the distant Imbrium basin formed scattered secondary craters, Orientale basin deposits blanketed a huge region on the west limb including the Mendel-Rydberg and Bailly basins, and Orientale ejecta formed many secondary craters beyond this blanket.
	astrogeology.usgs.gov /Projects/PlanetaryMapping/DIGGEOL/moon/1162/lstxt.asc (4532 words)

	Mare Cognitum (Site not responding. Last check: 2007-10-08)
		Mare Cognitum (the "sea that has become known") is a lunar mare located in a basin or large crater which sits in the sencond ring of the Procellarum basin.
		The basin material is of the Lower Imbrian epoch, while the basaltic mare material is of the Upper Imbrian epoch.
		To the northwest of the mare is the Montes Riphaeus mountain range, part of the rim of the buried crater or basin containing the mare.
	www.theezine.net /m/mare-cognitum.html (106 words)

	Irene Antonenko, Ph.D. Thesis: Chapter 4
		The upper age bound of the cryptomafic patches in this area is, therefore, 3.8 b.y., the age of the Orientale impact event [Wilhelms, 1987].
		The age of approximately 3.8 b.y., the boundary between the upper and lower Imbrian series, is therefore adopted as the upper age bound for the cryptomafic deposits in this region.
		For the younger cryptomafic unit, inside the inner ring of Humboldtianum, the terra material is adopted as the lower age bound and the light plains are adopted as the upper age bound.
	home.the-wire.com /~iant/Thesis/chapter4/chapt4.html (18788 words)

	Mare Tranquillitatis (Site not responding. Last check: 2007-10-08)
		Mare Tranquillitatis ("sea of tranquillity") is a lunar mare that sits within the Tranquillitatis basin on Earth's moon.
		The mare material within the basin consists of basalt in the intermediate to young age group of the Upper Imbrian epoch.
		The surrounding mountains are thought to be of the Lower Imbrian epoch, but the actual basin is probably Pre-Nectarian.
	www.tocatch.info /en/Mare_Tranquillitatis.htm (668 words)

	Alphonsus
		Alphonsus escaped being overwhelmed by the ejecta and uplift, but the crater walls were eroded and almost certainly settled as a result of the Imbrian impact, and the stresses of that impact also probably further weakened the crust in the floor of the crater.
		Around the same time as the Imbrian impact, Arzachel was created by a smaller impact, which coved the southern part of Alphonsus' floor with its ejecta.
		Even later, during the Upper Imbrian and Eratosthenian age, while the Nubium Basin was filling with basalt to become Mare Nubium, a number of grabens formed and several small volcanic eruptions took place on Alphonsus’ floor.
	jeff.medkeff.com /astro/lunar/r_ptolemaeus/alphonsus/index.htm (1854 words)

	Courses in Astrophotography
		It is located on the lunar highlands on the eastern end of Mare Nubium, west of the Imbrian Highlands, and slightly overlaps the Ptolemaeus crater to the north.
		The surrounding basin material is of the Lower Imbrian epoch with the mare material being of the Upper Imbrian epoch.
		The mare material is approximately 1km in depth, and mainly of the Nectarian and Lower Imbrian epochs, with the mare material of the Upper Imbrian epoch.
	www.damianpeach.com /lunar.htm (17231 words)

	Geological Society of America - GSA Today - v. 10, no. 8, August 2000
		The event also seems to have put an upper limit on the ages of surviving impact melts in the Apollo collection (Ryder, 1990; Dalrymple and Ryder, 1993).
		While the concept of a cataclysm has been controversial (Baldwin, 1974; Hartmann, 1975), recent analyses of impact melts in lunar meteorites (Cohen et al., 2000), which represent a much larger fraction of the Moon, have the same age limit and support a planetwide impact cataclysm.
		This was followed by the Early Imbrian Epoch, which began with the Imbrium impact and ended with the Orientale impact, again roughly 3.8–3.9 Ga, producing additional basin-size craters on the order of 1000 km diameter.
	www.geosociety.org /pubs/gsatoday/gsat0008.htm (4104 words)

	KEPLER – Part One
		It therefore appears to be Eratosthenian or Upper Imbrian.
		Kepler B is said to be Imbrian due to its degradation.
		Above the upper right horizon one can see a bit of a haze reminiscent of Hoagland’s TOWER seen on III84M.
	www.bibliotecapleyades.net /luna/esp_luna_12b.htm (1778 words)

	Belt of Venus: Mare Crisium and Cleomedes Crater
		The most prominent crater in the south end of the basin, Picard, is 23 km wide.
		Mare Crisium is a basin, created during the Nectarian epoch, while the mare material is of the Upper Imbrian epoch.
		Mare Crisium is an elongated crater that is 100 km wider in the E-W direction, although it doesn't appear that way because it is close to the edge of the moon from our vantage point.
	www.perezmedia.net /beltofvenus/archives/000288.html (174 words)

	Mare Cognitum (Site not responding. Last check: 2007-10-08)
		Mare Cognitum is located in a basin or large crater which sits in the sencond ring of the Procellarum basin.
		The mare formations are of the Upper Imbrian epoch, while the surrounding basin material is of the Lower Imbrian epoch.
		These mountains are a part of the rim crest of the buried crater or basin, containing the mare.
	lunar.arc.nasa.gov /science/atlas/mare/mcognitum.htm (97 words)

	Virtual Atlas of the Moon / Documentation (Site not responding. Last check: 2007-10-08)
		In the upper bar is indicated the name of the displayed formation and the zoom factor applied to the picture.
		About craters, it's the the difference between the upper part of the internal slopes and the floor.
		Observation date and hour can be set with upper cases, either clicking and entering directly them or using arrows buttons.
	astrosurf.com /avl/UK_doc1.html (6403 words)

	Mare Tranquillitatis (Site not responding. Last check: 2007-10-08)
		The mare material within the basin consists of basalt in the intermediate to young age group of the Upper Imbrian epoch.
		The surrounding mountains are thought to be of the Lower Imbrian epoch, but the actual basin is probably Pre-Nectarian.
		Mare Serenitatis is seen in the upper left of the photo below.
	lunar.arc.nasa.gov /science/atlas/mare/mtranquillitatis.htm (128 words)

	NEEP602
		Geologic Map of the Lunar Nearside (Upper Imbrian System) (Wilhelms, 1987) [277 kB]
		Geologic Map of the Lunar Farside (Upper Imbrian System (Wilhelms, 1987) [233 kB]
		Most impact velocities are between 15 and 20 km/sec, giving associated pressures of several hundred GPa and extraordinary amounts of heat as conversion of kenetic energy into forward and rearward shock waves takes place almost instantaneously.
	fti.neep.wisc.edu /neep602/lecture11.html (882 words)

	Virtual Atlas of the Moon / Documentation (Site not responding. Last check: 2007-10-08)
		For craters, it's the difference between the upper part of the internal slopes and the floor.
		When you click on the "Ephemeris" thumbnail, the right frame window fills with Moon sky and orbit position data: This position can be set entering some parameters.
		Observation date and hour can be set with upper case, either clicking and entering them directly or using the arrows.
	www.astrosurf.com /avl/doc/UK_Doc_Expert.html (7924 words)

	Mare Smythii (Site not responding. Last check: 2007-10-08)
		The Smythii basin where the mare is located is of the Pre-Nectarian[?] epoch, while the surrounding features are of the Nectarian[?] system.
		The mare material, which make up the floor of the mare, is a high alumious basalt, and consists of Upper Imbrian[?] basalt covered by Eratosthenian[?] basalt.
		The crater Neper is located to the north of the mare.
	www.city-search.org /ma/mare-smythii.html (326 words)

	* Universal Time - (Astronomy): Definition (Site not responding. Last check: 2007-10-08)
		NEW MOON FIRST QUARTER FULL MOON LAST QUARTER d h m d h m d h m d h m JAN. 2 20 23 JAN. 10 13 15 JAN. 18 10 48 JAN. 25 8 33 FEB. 1 10 48 FEB...
		-- Unified Theory of Active Galaxies -- United States Naval Observatory -- Universal time -- Universal Time -- Universe -- Upper Imbrian -- Uppsala Astronomical...
		For central Illinois, subtract six hours for Central Standard Time or five hours for Daylight Savings Time.
	en.mimi.hu /astronomy/universal_time.html (612 words)

	CloudyNight's forums: Mare Crisium and Cleomedes Crater - 10/30/04
		Here is a link to the illustration I put together.
		Mare Crisium is a 400 km x 500 km basin created during the Nectarian epoch, while the mare material formed during the Upper Imbrian eproch.
		Is that scary, or what?) Cleomedes is a flat basined crater with a central peak that wasn't visible while I was viewing.
	www.cloudynights.com /ubbthreads/showthreaded.php/Cat/0/Number/242625/page/20/view/collapsed/sb/5/o/all (563 words)

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