Ultrabasic soils

Ultrabasic rocks are so different from crustal rocks. So alien to continental earth surface, which is mostly granitic and not peridotitic.
The peridotite are with few exemptions,  mantle rocks (deep under surface, 30 km under continents and about 8 under the oceans).


They have the crust squeezed out of them to form the continental crust.
So they lack of crustal  elements.
They have Mg but also Fe, nickel and  chrome.

These rocks usually occur in Alpine type Orogens. Like in Franciscan in California. Or Alps to Hellenides. Or Venezuelan Cordilleras.  Ronda in Spain or Lherz in Pyrenees mountains.

Usually they high up in mountains from  1000-1500m and up.

But pastures are so green even in September....

Still plants are growing there.  Some special, endemic, growing only on this type of soils.
Forest even on northern dipping slopes.

I haven't read BBB but must be in chapter 8 under difficult soils

Mg in the water. Mg is trace element in drinking waters and soils but still very necessary part of  chlorophylle molecule and ?muscle¿ cells.

Concentrations of Mg in ultrabasic massif's spring's water  are highest you can get, right?
.....
Water on/in limestone/ dolomite is basic [Ph7 and higher]
.....

Mg in Chlorophylle molecule
One tiny metal ion in the huge framework of  C H and ?N¿.

Is somebody living on this type of soil?