it has similarities to sand wedges in the Permian reef limestones of the Guadeloupe Mtns in New Mexico
AMF, here's where the similarity ends. Permian wedges are earthquake related, if memory serves me. Pine Barrens sand wedges are the result of frost cracking – cryodessication and/or thermal-contraction. The latter type have distinct primary infill laminations that, as far as I know, can only be generated under dry permafrost conditions,
i.e., sand wedges. Note the vein propagating off towards the trowel held by my good friend Chris 'Cold Front' Karmosky, now Assistant Professor of Meteorology at the University of Tennessee at Martin during a graduate geomorphology field class I co-taught. These are not ice wedge relicts. These are not seismic (earthquake) wedges.
Close-up of an older (≥65 ka) sand-wedge cast near the Delaware Bay (39º 19’ N).
It is indicative of continuous permafrost south of the Mason Dixon if extrapolated eastward.
This pit section is adjacent to the Manumuskin River Preserve.
Today sand wedges only occur in places like East Greenland or the dry valleys of Antarctica. During Ice Age global cooling, water was scarce, so sand wedges are commonplace in ice marginal locations throughout the world. Places like Wyoming, New Jersey, England, and Poland are often polar desert-like. Thermal-contraction sand wedges are also common during Snowball Earth, a series of cold periods before 650 million years ago when our planet was pretty much a Popsicle.
S-M