Examples of Crater Chains:

There are several known types of crater chains, or what are called crater chains. The examples we have found are listed below.

Ejecta chains: made by thrown material from an impact or ejected by force from below.
Volcano chains: a linked series of volcanoes.
Sunken chains: made by liquid flow under the chain causing collapse of the surface.
Lightening chains: the resultant rip, tear, or etching of a surface by electrical discharge.
Rubble chains: possible tidally disrupted rubble pile comet impacts.
CS chains: under investigation for probable cause.

Ejecta chains:
Volcano chains:
Sunken chains:
Lightening chains:
Rubble chains:
CS chains:

The upper left picture illustrates the expelled material.  The ejecta makes a general uniform pattern around the crater emanating from the center. Another type of ejecta would be from subsurface explosions along a volcanic fault line, or from gas eruptions.  On our planet we see sunken holes caused by an underground water flow collapsing at intervals.  Just as lightning leaves definitive after effects from a strike. All of these types are easily recognizable and their properties of cause well understood.
The bottom picture of a probable rubble pile tidally disrupted comet strike, and the probable pattern it would create if disrupted with in seconds before impact.
CS chains are chains that do not fit the above types because of the obvious lack of an acceptable explanation for known trajectories and alignments.

2 http://daac.gsfc.nasa.gov/DAAC_DOCS/geomorphology/GEO_3/GEO_PLATE_V-27.HTML
3 http://daac.gsfc.nasa.gov/DAAC_DOCS/geomorphology/GEO_3/GEO_PLATE_V-27.HTML
4 http://daac.gsfc.nasa.gov/DAAC_DOCS/geomorphology/GEO_7/GEO_PLATE_KL-4.HTML
5 http://daac.gsfc.nasa.gov/DAAC_DOCS/geomorphology/GEO_7/GEO_PLATE_KL-4.HTML
7 http://photojournal.jpl.nasa.gov/catalog/PIA02960
8 http://photojournal.jpl.nasa.gov/catalog/PIA01087