Radiator Help

I currently have a 1997 LR DISCOVERY. The radiator recently blew out most of the coolant that was in the expanstion tank, so I let it cool and refilled it. About 20 miles later it started coming down like a river so I parked it. It looked as though it was leaking from the expansion tank, and I don't want to take any chances so I am going to have it towed soon to my local mechanic. I was wondering if it was common for just the expansion tank to have a leak or if it is most likely do to other problems with the radiator. I filled it again just to see where it was leaking and it leaked to about half way up the expansion tank, and it looks like that may be where it is cracked. Any help is greatly appreciated

Thanks
CSN4646

It seams to me you're overreacting on this.....just replace the expansion tank yourself(dont spend money on mechanics for such a simple thing), fill it and go for a ride.....if everything is "cool" dont bother with it, it didnt hurt the radiator. It's more uncommon this than the radiator leak itself........but a leak is just a leak.......taking into acount that it was just the expansion tank it didnt even occure the risk to overheat the engine cause u didnt loose coolant from the circuit itself.