(former IAU name: Cordillera Mts)
Lat: 19.6°S, Long: 94.7°W, Diam: 945 km (see [/Montes%20Cordillera#IAU_Data note]), Height: 6 km, [/R%C3%BCkl%2050 Rükl: 50]
Table of Contents
LO-IV-187M The circles superimposed on this [/Lunar%20Orbiter Lunar Orbiter] view indicate what are probably most usually taken to be the IAU's Montes Cordillera and [/Montes%20Rook Montes Rook] ranges around [/Mare%20Orientale Mare Orientale]. [/Montes%20Rook Montes Rook] probably includes the ring of peaks inside the inner circle, a formation known to many lunar geologists as the Inner Rook Ring.
([/LAC%20zone LAC zone] 108B2) In [/USGS%20Digital%20Atlas USGS Digital Atlas] mapped on LAC-90 PDF, LAC-73 PDF, LAC-108 PDF, and LAC-91 PDF. For an overview see Farside PDF. See also the older LMP-1 and LMP-2.
([/IAU%20Directions IAU Directions]) THE CORDILLERAS.--Close to the W. limb; they lie between S. lat. 8 deg. and S. lat. 23 deg.
- The position and coordinates given in the title line (and illustrated in the [/Lunar%20Orbiter Lunar Orbiter] image) differ from those in given on the IAU page.
- The names Rook and Cordillera were originally given by Earth-based observers, but lunar geologists using [/Lunar%20Orbiter Lunar Orbiter] overhead views made the distinction between the Inner Rook and Outer Rook Mountains because there are two different rings. The smaller circle on the diagram above is the Outer Rooks, and the more fragmentary 480 km wide Inner Rook chain is easily visible inside it. From Earth these looked like one mountain chain. The offical IAU nomenclature just has Rook Mountains - the IAU is about 40 years behind science in recognizing that there are two Rook rings. Some lunar scientists interpret the conspicuous Cordillera as the main rim of the [/Orientale%20Basin Orientale Basin], others think that the hilly material in the moat between the Cordillera and Outer Rook is basin ejecta, therefore the Outer Rook would be the main rim. See [/Orientale%20Basin Orientale Basin] for more information. - tychocrater tychocrater Oct 30, 2007
- Depth data from [/Kurt%20Fisher%20crater%20depths Kurt Fisher database]
- Viscardy, 1985: 6 km
- Cherrington, 1969: 6.09 km
- "Cordillera" is Spanish for "mountain chain".
- Cordillera Mts. was included in the original IAU nomenclature of [/Blagg%20and%20M%C3%BCller Blagg and Müller]. It was No. 2029 in Blagg's [/Collated%20List Collated List], where she notes the name was used by [/Beer%20and%20M%C3%A4dler Beer and Mädler]. According to Baum and Whitaker (p. 132), Beer and Mädler applied this name to the region between the modern [/Eichstadt Eichstadt] and [/Schl%C3%BCter Schlüter], which they depicted as a continuous range of mountains. The name may have been inspired by Schröter's earlier mention of having observed a "sehr hohen Mondcordilleren" in this vicinity (ibid, p. 130).
- The understanding of the Cordillera Mts by early 20th century observers trying to follow the IAU nomenclature did not necessarily correspond to the present understanding of the term. For example, [/Wilkins%20and%20Moore Wilkins and Moore] place the Cordillera Mts well to the south, on the far side of Mare Orientale, at the limit of what can be seen at the most favorable libration. This most likely corresponds to farside peaks of the inner rings. They place the Rook Mts still farther south, and at a similarly extreme longitude, corresponding possibly to some of the more distant parts of the present Montes Cordillera. The peaks on the nearside of Mare Orientale are not named. The [/DMA Army Map Service]'s early [/LTM LTM] series (attempting to illustrate the [/Blagg%20and%20M%C3%BCller Blagg and Müller] nomenclature) placed these features in the same way (see LTM-2 and Shaded Topo 2).
- As noted by [/Whitaker Whitaker] (p. 235), the Cordillera Mts. was among the features the [/LPL LPL] felt were inadequately identified in [/Named%20Lunar%20Formations Named Lunar Formations], and they "moved" the name to the feature(s) intended by the "original authority" (Mädler, in this case). These changes were published in [/PLA%20Table%20III Table III] of their [/Photographic%20Lunar%20Atlas Photographic Lunar Atlas], and approved by the IAU in 1961 ([/IAU%20Transactions%20XIB IAU Transactions XIB]).
- The name was Latinized to Montes Cordillera in 1964 ([/IAU%20Transactions%20XIIB IAU Transactions XIIB]).
- Since the name is not mentioned in any subsequent [/IAU%20Transactions IAU Transactions], it is not entirely clear if the IAU name was ever meant to include the full extent of the ring made visible by the views from space. A 1969 written memo by the then Lunar Nomenclature Working Group chairman suggests this was the intention, but it does not seem to have been voted on (see [/Mare%20Orientale Mare Orientale] Nomenclature).
- The "definition" of Montes Cordillera indicated by the circle shown above agrees with the labeling of this feature in the unofficial [/USGS%20Digital%20Atlas USGS Digital Atlas], which seems to be based on NASA's LMP-1 and LMP-2 (prepared by the [/DMA DMA]).
- Lunar geologists, whose terminology does not always correspond to the IAU names (see, for example, [/Apennine%20Front Apennine Front]), typically refer to the complete ring as the Cordillera Ring, or, less commonly, the Cordillera Mountains. Head (1974) also suggests the alternative name [/Eichstadt Eichstadt] Ring (after the crater on the rim. They assign this ring a diameter of 900 km (Head, 1974) to 930 km (Bussey and Spudis, 1997).
- On Hans Schwarzenbach's lunar farside map of Hallwag, Montes Cordillera is printed as Montes Cordilleres.- DannyCaes DannyCaes Oct 24, 2010
- Montes Cordillera seems to be a difficult name, because it is mentioned as Montes Cordellaris on page 177 of Charles J. Byrne's The Far Side of the Moon; a Photographic Guide (Springer, 2008). Hmmm... Montes Cordellaris... On page 174 it is mentioned as Montes Cordillara. - DannyCaes DannyCaes Dec 9, 2017
- (see [/Mare%20Orientale Mare Orientale] for additional LPOD links)
- [/Baum%20and%20Whitaker%2C%202007 Baum and Whitaker, 2007]
- Bussey, D.B.J. & P.D. Spudis. 1997. Compositional analysis of the Orientale basin using full resolution Clementine data: Some preliminary results. Geophysical Research Letters v24, p445-448.
- Head, J.W. 1974. Orientale multi-ringed basin interior and implications for the petrogenesis of lunar highland samples. Earth, Moon, and Planets v. 11 p327-356.
[/Alphabetical%20Index Named Features] -- Prev: [/Copernicus Copernicus] -- Next: [/Cori Cori]
This page has been edited 1 times. The last modification was made by - tychocrater tychocrater on Jun 13, 2009 3:24 pm - afx3u3