Forum discussion tagged with #geology.
  1. orxan662

    Differentiation of depth-gravity anomaly function.

    Assume we measure bouguer anomaly (g) and depth (H) of the certain horizon through a profile at each point. Based on data we get a correlation between H and g and express it with a polynomial equation like H(g)=a1g^n+a2g^(n−1)+...+a .What the first and second derivative of the equation will give us?
  2. A

    Does anyone know what is growing on this crystal?

    This is growing on an amethyst from either Brazil or Uruguay. Can't seem to find what it's called. Slightly metallic and layer formed. Any identification would be so helpful, thank you.