Mare Anguis

Mare Anguis is a lunar mare, or broad basalt-filled plain, located on the near side of the Moon. Its name is derived from Latin and is commonly translated as “serpent sea.” The feature is approximately 150 kilometers in diameter and lies within the larger Crisium basin, a prominent impact structure on the lunar surface. Unlike an ocean on Earth, a lunar mare is a solid expanse of ancient volcanic rock; the dark appearance of Mare Anguis reflects the presence of basalt that filled a pre-existing depression after large-scale impacts and subsequent volcanic activity. The mare forms part of a concentric ring system northeast of the rim of Mare Crisium. It stands at an elevation of roughly 800 meters above Mare Crisium and is connected to that larger mare by channels descending toward it. These channels may preserve evidence of lava movement between the two regions, although the available description does not establish the precise history or volume of any such flows. In geological terms, Mare Anguis belongs to the Nectarian System, indicating that its principal formation and surface development are associated with the Nectarian period of lunar history. A small impact crater, Eimmart A, approximately 7 kilometers in diameter, marks the eastern edge of Mare Anguis. This crater has been proposed as a possible source for the Antarctic meteorite ALHA81005. The impact appears to have excavated material from the mare basalt, and the mineral mixture identified in the meteorite—olivine together with low-calcium pyroxene—has been cited as consistent with material from such a basaltic lunar setting. This proposed connection makes the feature relevant not only to lunar cartography and geology but also to the interpretation of lunar meteorites. Mare Anguis is not a commercial brand or operating organization. It is a named astronomical and geological feature, and the supplied Wikipedia subject is authoritative for this entry. No company, owner, management structure, product portfolio, headquarters, website, financial information, or commercial market applies to it.

Mare Anguis is a basaltic plain on the Moon's near side. It occupies part of the Crisium basin, a large impact-related geological region, and is positioned northeast of the rim of Mare Crisium as one element of a concentric ring surrounding that basin. The mare is about 150 kilometers across and is elevated approximately 800 meters above Mare Crisium. Its dark surface is characteristic of lunar maria, which are extensive plains created when volcanic basalt flooded older impact depressions. The geological classification supplied for Mare Anguis places it within the Nectarian System, linking its principal formation to the Nectarian period of lunar history. Channels extend from Mare Anguis toward Mare Crisium, suggesting that lava may have moved downslope between the two areas. The available reference describes possible signs of such flow but does not provide a definitive chronology or detailed volcanic model. The eastern boundary includes Eimmart A, a small crater with an estimated diameter of 7 kilometers. The crater has been proposed as a source location for the Antarctic lunar meteorite ALHA81005. Its impact may have brought mare basalt to the surface, offering a possible explanation for the olivine and low-calcium pyroxene detected in the meteorite's spectrum. This proposed relationship illustrates how remote lunar features can be studied through both orbital observation and laboratory analysis of meteorites found on Earth. Mare Anguis has no corporate history, commercial operations, product launches, executives, campaigns, or ownership structure. Its historical significance is geological: it records the interaction of ancient impacts, basaltic volcanism, topographic drainage, and later impact excavation on the lunar surface.

• Identification as a lunar mare

  [1]Mare Anguisen.wikipedia.org

  Mare Anguis is identified as a dark, basalt-filled plain on the Moon's near side, approximately 150 kilometers in diameter.

• Association with the Crisium basin

  [1]Mare Anguisen.wikipedia.org

  The feature is described as part of the Crisium basin's northeastern concentric ring system and as lying about 800 meters above Mare Crisium.

• Possible lava channels toward Mare Crisium

  [1]Mare Anguisen.wikipedia.org

  Channels connect Mare Anguis with Mare Crisium and may preserve indications of lava flowing toward the lower-lying mare.

• Eimmart A and lunar meteorite research

  [1]Mare Anguisen.wikipedia.org

  The 7-kilometer crater Eimmart A, on the eastern edge, has been proposed as a possible source of Antarctic meteorite ALHA81005 and its olivine/low-calcium-pyroxene mineral signature.

A named lunar geological feature rather than a commercial brand or business entity.

1. 1Mare Anguisen.wikipedia.org