You can find dark fossils anywhere after completing the test in rivet ravine:)
dropping fossils are found in dark fossils anywhere around vivosaur island.
You can find him at bonemoth
At Parchment Desert
You can find Salto fossils in the BB Base.
if you mean where do you get dark fossils in fossil fighters I usually go to the rivit ravene and go up the first flight of stairs then go to the right until you see another flight of stairs going down. go down there and search I almost always find dark fossils there along with some other rare regular fossils. Ninjapower5`s suggestion: I suggest Mt: lavaflow because its basically a place where dinosaurs use to rome.
You can find them in Miraculous Fossil rocks.You can find those in any Fossil Park but it is very hard to find one.They appear as Yellow dots on your sonar,but the yellow dots can also be Fossil rocks,Dark Fossil rocks,and Wonderous Fossil rocks.
it is in the pirate ship in bottomsup bay.
Dark fossils will have either dropping fossils, rare fossils (red fossils... 25 point bonus to your cleaning score), or jewels (if you're really lucky, you'll find a colossal diamond... the rock is very hard in requires a lot of hammer work).
In the Mole's secret tunnel after you beat the game
You find all the Cerato fossils in Rivet Ravine. NOT in the mine, in the plain.
In Rivet Ravine tunnel #5.
in rivet ravine 1st tunnel you find u-raptor fossils