Balch (crater)

Crater characteristics
	Magellan radar map of Balch
Planet	Venus
Coordinates	29.9°N 282.9°E
Quadrangle	Guinevere Planitia
Diameter	40 km
Eponym	Emily Balch

Balch is a crater on Venus at latitude 29.9, longitude 282.9 in Devana Chasma, Central Beta Regio. It is 40 km in diameter and named after Emily Balch, though it was originally designated Somerville crater. This crater is one of the few examples of tectonically modified craters seen on Venus.[1] Approximately half the crater was subsumed into a valley.[2] The absence of such craters indicates a possible cessation of tectonic deformation on Venus at some point in history.

References

Frances, Peter (2012). Universe: The Definitive Visual Guide. New York, New York: DK Publishing. p. 122. ISBN 978-0-7566-9841-6. Retrieved 29 April 2020.
Bailey, Janelle M.; Slater, Timothy F.; Slater, Stephanie J. (September 2010). Conducting Astronomy Education Research. Macmillan. ISBN 9781429264099.

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[universe-1] Frances, Peter (2012). Universe: The Definitive Visual Guide. New York, New York: DK Publishing. p. 122. ISBN 978-0-7566-9841-6. Retrieved 29 April 2020.

[2] Bailey, Janelle M.; Slater, Timothy F.; Slater, Stephanie J. (September 2010). Conducting Astronomy Education Research. Macmillan. ISBN 9781429264099.