Kepler region

Kepler dome (termed Kepler 1) and Encke dome (termed Encke 1)

By Mike Wirths

by Paolo Lazzarotti

by Mike Wirths

Dome	Longitude	Latitude	Diameter [km]	Heigth [m]	Slope[°]
Kepler 1 Encke 1	-39.53° -36.76°	-08.88° 03.55°	13.9 ± 0.5 33 x 30± 0.5	170 ± 20   180 ± 20	1.4 ± 0.1 0.62± 0.1

Kepler 1, with its moderate slope of 1.4° ± 0.1°, diameter of 13.9 km ± 0.5 km, lies in an area of relatively thin lavas fails to completely cover hummocky Imbrian basin ejecta. It is a degraded dome with several craterlets on its summit. The rheologic model indicates a moderate lava viscosity and belongs to class C2 domes like some domes in Mare Tranquillitatis, such as Cauchy τ and ω. The rheologic modelling results indicate that the dome was produced by magmas ascending at low speed from magma reservoirs located at great depth below the lunar crust. The dome  Encke 1 (En 1) is 180 m high, while the average slope angle corresponds to 0.62°. Furthermore, the flat appearance of En1 suggests that the rising magmas did not build up a dome through a series of flows, but that it was more likely formed by rising magma collecting in a reservoir, forming a subsurface intrusion.The dome En1 is associated with two graben traversing its northeastern summit and the central summit, respectively. Due to its large diameter and edifice volume, the dome En1 matches the properties derived for putative intrusive dome belonging to group In1.