"Salty black" is not a standard term in any academic field or scientific discipline that I am aware of. Without further context or clarification, it is difficult to provide a specific answer to this question. If you can provide more information or specify the context in which "salty black" is being used, I would be happy to help provide a more accurate response.
Some minerals can have taste characteristics such as salty or bitter taste.
Caviar
Baking soda is a white powder that is salty and abrasive. It is also known as sodium bicarbonate and has many different uses.
sandy rocky salty water
The cast of Salty Black Sugar - 2012 includes: Chelsea Wheatley
baltic area
The cast of Phantoms of the Night - 2006 includes: Pepper Black as Pepper Black Salty White as Salty White
Soy sauce is a brown, salty, liquid used as a condiment
Soy sauce is a brown, salty, liquid used as a condiment
Dead Sea.
The great lake isn't salty because its water comes from different rivers and streams.
The Black Sea is the most salty one.