  We present spatially resolved Spitzer imaging of the supergiant shell region
of the M81 group dwarf galaxy IC 2574 obtained as part of the Spitzer Infrared
Nearby Galaxies Survey. This region harbors one of the best nearby examples of
a kinematically distinct HI shell, with an associated remnant stellar cluster;
the shell is initiating sequential star formation as it interacts with the
surrounding interstellar medium. This region dominates the infrared luminosity
of IC 2574 and is spatially resolved in all Spitzer imaging bands. We study the
differences in dust temperature as a function of local environment and compare
local star formation rates as inferred from H Alpha and total infrared
luminosities. We find that the strong H Alpha sources are associated with
regions of warm dust; however, the most luminous infrared and H Alpha sources
are not necessarilyco-spatial. The coolest dust is found in the regions
farthest from the rim of the shell; these regions show the best agreement
between star formation rates derived from H Alpha and from total infrared
luminosities (although discrepancies at the factor of 3-4 level still exist).
There is considerable variation in the radio-far infrared correlation in
different regions surrounding the shell. The low dust content of the region may
influence the scatter seen in these relations; these data demonstrate that the
expanding shell is dramatically affecting its surroundings by triggering star
formation and altering the dust temperature.
