I screwed up USB drive

I am an absolute newbee at linux. I was just trying to format some old usb drives that i dont need anymore with the command line. I did figure out how to do it but the first one i messed up. I think i deleted a partition but did not format it. Now it wont mount. I have spent a couple of hours trying to figure out how to fix it. If I do the dmesg command i see this. [ 2747.076160] usb 1-1.2: Manufacturer: LEXAR MEDIA
but it wont mount. I wanted to figure this out myself but have not been able to do it. It may be through using parted but i am so new to that also.