  Spontaneous and triggered star formation in the LMC is discussed with data on
star clusters ages and positions. The supershell LMC4 and the stellar arcs in
the same region are suggested to be triggered by GRBs, the progenitors of which
might have escaped the old elliptical cluster NGC1978, close to which are a
number of X-ray binaries and the SGR/SNR N49.
