Sending Unit Sock Remnants??

[slikside]

A couple weeks ago I replaced a clogged fuel filter in my q-jet carb. The pile on the right (looks like chopped chives, green too) is mostly what was in it then. Yesterday I decided to check how my new fiter was doing. The pile on the left is what came out this time (looks like a pile of whiskers, they are non-metallic).

Does either one, or both of these look like they could be remnants of the sock from the sending unit in the tank? The truck is a 72 C10 that I've had for 34 years, and I know the tank has not been cleaned out in that time. Highly unlikely that it was before I owned it.

Thanks all.