Update, I ran gdisk on this as a hunch and here's the results.
root@Tower:~# gdisk /dev/sdc
GPT fdisk (gdisk) version 1.0.4
Caution: invalid main GPT header, but valid backup; regenerating main header
from backup!
Warning: Invalid CRC on main header data; loaded backup partition table.
Warning! One or more CRCs don't match. You should repair the disk!
Main header: ERROR
Backup header: OK
Main partition table: OK
Backup partition table: OK
Partition table scan:
MBR: protective
BSD: not present
APM: not present
GPT: damaged
****************************************************************************
Caution: Found protective or hybrid MBR and corrupt GPT. Using GPT, but disk
verification and recovery are STRONGLY recommended.
****************************************************************************
Command (? for help): q
Is it a good idea to proceed to write the table to the disk? I'm not super familiar with gdisk, but saw this as a fix for someone with the same issue here: