Complex sentence: The stone fell at around 3 o'clock, on 13 December 1795, it created a crater approximately across, and embedded itself in the underlying chalk rock to a depth of, passing through of topsoil.
Split into simpler sentences: The stone fell at around 3 o'clock, on 13 December 1795. It created a crater approximately across, and embedded itself in the underlying chalk rock to a depth of, passing through of topsoil.