Richardson Mountains is in
continuous permafrost region. Many areas are experiencing
retrogressive thaw slump. This region contains well-exposed
sedimentary rocks of
Proterozoic to
Cretaceous age and small
Devonian granite intrusions. Late Cretaceous to
Tertiary compression inverted the original extensional structures, forming the Richardson Anticlinorium. This north-plunging structure is approximately 75 km wide and exposes rocks ranging from the Proterozoic to
Carboniferous. ==See also==