Measuring mudboil activity
The brightly painted stones laid out on this mudboil lie on numbered aluminum tags that are attached to the mudboil surface with 10cm-long common nails. This is one of several sites revisited in succeeding years to observe distortion of this pattern by diapirism and other near-surface processes associated with the active layer in this permafrost terrain. Rates of movement associated with mud boils, central District of Keewatin details how the numbered tags moved relative to each other. Spacing along the long line is 10cm, cross lines 20cm. See image 0240 for a discussion of the processes responsible for forming and deforming mudboils.
Updated 03/30/2010 AW