Elasticity 
Elasticity is, in geodynamics, often used in combination with viscous and plastic rheology. We provide the following elastic constitutive relationships:
GeoParams.MaterialParameters.ConstitutiveRelationships.ConstantElasticity Type
julia
ConstantElasticity(G, ν, K, E)Structure that holds parameters for constant, isotropic, linear elasticity.
sourceGeoParams.MaterialParameters.ConstitutiveRelationships.SetConstantElasticity Function
julia
SetConstantElasticity(; G=nothing, ν=nothing, E=nothing, Kb=nothing)This allows setting elastic parameters by specifying 2 out of the 4 elastic parameters G (Elastic shear modulus), ν (Poisson's ratio), E (Young's modulus), or Kb (bulk modulus).