Wallrock alteration has been recognized a valuable tool in exploration, because the alteration haloes around many deposits, are widespread and easier to locate than the orebodies themselves. At various distances from a vein, the conditions of temperature and chemistry are usually different.
Bitcoin Core integration/staging tree. https://bitcoincore.org. Bitcoin is an experimental digital currency that enables instant payments to anyone, anywhere in the world. Bitcoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Bitcoin Core is the name of open source software which enables the use of this currency. For more information, as well as an immediately useable, binary version of the Bitcoin Core software, see https://bitcoin.org/en/download, or read the original whitepaper.
Bitcoin Cash (BCC) is a cryptocurrency created via a fork of the Bitcoin network. This means that any user who held Bitcoin at the time of the fork (August 1st, 2017), now has an equivalent amount of Bitcoin Cash on the forked Bitcoin Cash blockchain.