The McCauley Sinks, in the Holbrook basin of northeastern Arizona, are comprised of some 50 individual sinkholes within a 3-km-wide depression.
The sinks are grouped in a semi-concentric pattern of three nested rings. The outer ring is an apparent tension zone containing ring fractures. The two inner rings are semi-circular chains of large sinkholes, ranging up to 100 m across and 50 m deep.
The McCauley Sinks lie south of Winslow along the western edge of Permian salt in the Holbrook basin.
![mccauley sinks arizona, mysterious mccauley sinks arizona, sinkhole arizona, crack arizona, sinkhole formation arizona, the sinks arizona, could part of arizona be swallowed by giant sinkholes, giant sinkholes winslow arizona, mysterious mccauley sinks arizona](https://strangesounds.org/wp-content/uploads/2014/12/mysterious-mccauley-sinks-arizona.jpg)
Such large evaporite rock formations are all good if everything stays stable. But as shown by the U.S. Geological Survey, several sub-basins within the larger depression show local downwarping and possible incipient sinkholes.
![mccauley sinks arizona, mysterious mccauley sinks arizona, sinkhole arizona, crack arizona, sinkhole formation arizona, the sinks arizona, could part of arizona be swallowed by giant sinkholes, giant sinkholes winslow arizona, mysterious mccauley sinks arizona](https://strangesounds.org/wp-content/uploads/2014/12/mysterious-mccauley-sinks-arizona-1.jpg)
This is actually no wonder when you learn that the main surface lithology is a limestone – Permian Kaibab Formation limestone – a passive rock unit that collapses into solution cavities developed in underlying salt beds.
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Moreover, giant earth cracks are opening up in the dry ground of Navajo County!
![mysterious mccauley sinks arizona, sinkhole arizona, crack arizona, sinkhole formation arizona, the sinks arizona, could part of arizona be swallowed by giant sinkholes, giant sinkholes winslow arizona, mysterious mccauley sinks arizona](https://strangesounds.org/wp-content/uploads/2014/12/mysterious-mccauley-sinks-arizona-3.jpg)
The Richards Lake depression, 5 km southeast of McCauley Sinks, is similar in form and size but contains only a single, central sinkhole. Meteor Crater (photo below) is also in the region, 20 miles west of Winslow, AZ.
![meteor crater, meteor crater arizona, meteor crater arizona photo, pics of meteor crater in Arizona](https://strangesounds.org/wp-content/uploads/2014/12/meteor-crater.jpg)
If you want to know more about this mysterious sinkhole formation area in Arizona, read this scientific publication.
[…] Did you know that the Navajo County was full of giant sinkholes? […]