A 'crater' of finite width was thereby obtained.
Second, the transverse distribution of laser intensity and light pressure over a focus of finite size leads to crater formation, destroying the planar target geometry.
For femtosecond pulses, the crater profiles were without convexity formation.
This, combined with the young age of the oceanic crust, explains why few craters are likely to be found in the oceans.
There is a strong tendency for larger craters to occur within them.
The inner crater in the crystalline basement is often the only part of the concentric structure that is preserved or recognizable.
Another scenario would be that the organic component was carried and deposited by hydrothermal fluids circulating in the crater after impact.
An enlarged view of those spines (fig. 6 inset) show that they are located in crater-like holes in the tegument.
