Rupes Altai and Piccolomini region
Piccolomini dome (termed Pi1)
by Paolo Lazzarotti
Dome
|
Longitude
|
Latitude
|
Diameter [km]
|
Heigth [m]
|
Slope[°]
|
Piccolomini1
|
28.56°
|
-27.46°
|
14 ± 0.5
|
350 ± 30
|
2.9 ± 0.3
|
It is located about 85 km northwest of the crater Piccolomini inside the
Nectaris basin, about 30 km closer to its centre than the Altai Scarp. The dome
Pi1 is characterised by a high lava viscosity of 107 Pa s. Its
rheologic properties are similar to those of the comparably steep domes north
of Hortensius in Mare Insularum. Pi1 belongs to class B1 domes due
to its high lava viscosity. The rheologic modelling results and inferred dike
geometries indicate that the dome Pi1 was produced by magma of high viscosity ascending
at low speed from magma reservoirs located at great depth below the lunar
crust.