What's the singular form of crossbedding? Here's the word you're looking for.
Answer
The noun crossbedding can be countable or uncountable.
The singular form of crossbedding is also crossbedding.
Examples
Crossbedding in the gray sandstones shows that it is now right side up, and in Flagstaff time it was therefore on the east flank of a steply folded anticline.