Use this geological calculation for a transparent first-pass interpretation of measured rock, soil, fluid, well, stratigraphic, isotopic, geophysical, or seismic data under an explicitly selected model.

Crystal fraction

Volumetric crystal fraction, 0 to 1.

Crystal density

Crystal density in kilograms per cubic meter.

Melt density

Melt density in kilograms per cubic meter.

Bulk magma density as the volume-weighted mixture of melt and suspended crystals: rho = rho_melt (1 - phi) + rho_crystals phi. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Magma density

Bulk magma density in kilograms per cubic meter.

• Geotechnical correlations and idealized failure models depend on stratigraphy, sampling disturbance, drainage, stress history, groundwater, density, anisotropy, scale, construction sequence, and laboratory or field method. Site-specific design requires investigation and code factors.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Compare independent measurements and models, retain units and analytical metadata, propagate uncertainty, and validate interpretations against logs, cores, maps, laboratory data, or field observations.

• Well Log Porosity Density Calculator

  Density-log porosity phi_D = (rho_ma - rho_b) / (rho_ma - rho_f) from bulk, matrix and pore-fluid densities in kilograms per cubic meter; the standard formation-density porosity relation.

• Dry Density Calculator

  Compute dry density from wet (bulk) density and gravimetric water content using rho_d = rho / (1 + w).

• Overburden Gradient Calculator

  Compute the vertical overburden stress gradient Sv = rho_bulk * g from average bulk density.