Q
qrk quark
https://chainz.cryptoid.info/qrk/#!crypto
https://bitcointalk.org/index.php?topic=2042673.0
Here's the block explorer again.
http://www.nodepow.com/site/block?id=305
http://www.nodepow.com/explorer/QRK
Freiexchange informed me on Feb 17 that the wallet was in resync.
http://www.nodepow.com/explorer/QRK
https://miningpoolstats.stream/quarkcoin