Ken gave me a bit of a tour to a few ice age flood and flood basalt sites. One site was the best spheroidal weathering I have seen - at least from an aesthetic standpoint.
Top of weathered basalt columns
Top of weathered basalt columns above the ice age flood scoured Babcock Bench
Columns and spheroidal weathering
A fully detached column top
Babcock Bench below and Columbia River in the distance