Geography Reference
In-Depth Information
Figure 34. A heart-shaped crater of the Qinghai Lake probable structure (D=60 km) [1]
according to ENDDB: a) relief according to ENDDB, b) tail-shaped gravity anomalies
according to [72]. Dark color shows gravity lows.
A
heart-shaped geometry
is another morphological feature of craters, in
addition to the tail-shaped asymmetry, likewise identified according to EISC
[1]. This geometry is quite common to impact structures in the catalog
(Figures 33, 34); some heart-shaped structures also have larger or smaller
―tails‖ (e.g., the Lasnamäe crater [1]).
Figure 35. Tail-shaped gravity low according to ENDDB, accompanying potential
astroblemes: a) Ladoga (D=80 km, 0.0385 Ma) and Onega (D=125 km, 0.0385 Ma), b)
Kurai Basin (D=21,5 km, 34-200 Ma), c) Jeskazgan (D=100 km). Arrows in (a) show
the direction of CB trajectory, determined from tail-shaped forms filled with water
(black) and from gravity lows [72] (white). The scale shows gravity in mGal.
