Is it possible to create a MySQL slave from a MariaDB master? I need to create a MySQL slave instance which replicates the data from a MariaDB master. (I guess it won't work.) Any advice on how to create this replica architecture using MariaDB and MySQL?

I am also investigating and considering using tungsten. Does anybody have experience with it?
I think it can work, see e.g. this question (with answers). Note that: 


You won't be able to use GTID replication as this is implemented differently in MariaDB and MySQL
You need to use versions of MySQL and MariaDB which are somewhat compatible. 
Avoid using any MariaDB-specific features.