mercoledì 16 luglio 2014

Messier region

Messier domes (termed Messier 1-2)

By George Tarsoudis


Dome
Longitude
Latitude
Diameter [km]
  Heigth [m]
Slope[°]
Messier 1
Messier 2
43.47°
50.42°
-1.95°
-2.50°
7.7 ± 0.5
8.7x6.4 ± 0.5
   85 ± 10
   80 ± 10
1.26 ± 0.1
1.12 ± 0.1


Two domes near Messier, which are similar to each other with respect to their morphometric, rheologic, and spectral properties, belong to class C2 with a tendency towards class C1 due to their moderate R415/R750 value. With their inferred moderate lava viscosities these domes share the properties of rheologic group R1. Accordingly, the inferred magma rise speed amounts to several 10-4 m/s and their feeder dikes were 10–12 m wide and 45–54 km long.