GEONAVIGATE / RESOURCES
Geology guides & worked examples
Explore geological concepts through illustrated explanations, calculations and practical workflows. Choose a subject below, or use the dictionaries for individual terms.
Water, pores & rock properties
Groundwater flow Hydraulic head, Darcy flux, pore-water velocity and a worked sorption-delay example.Permeability & conductivity Fluid viscosity and flow along or across layered rocks, with worked examples.Aquifer storage Transmission, storage, water-table drainage and pore-volume ratios.Capillary entry Pore-throat size, wettability and entry pressure.Effective stress Pore pressure, framework stress and compaction.
Rocks, minerals & sediments
Stable isotope comparisons Calculate delta values and ordered ratio factors; distinguish numerical contrasts from geological causes.Metamorphic mineral evidence Map isograds with comparable rocks and distinguish preserved minerals from later overprints.Mineral–melt partitioning Concentration ratios, compatibility, mass inventory and mineral assemblage calculations.Mineral identification Cleavage, optical properties and feldspar textures, plus a worked phase-proportion balance.Sediment texture Grain size, sorting, shape and clast-fabric interpretation.
Structure, time & geophysics
Strike & apparent dip Project true dip into a section; distinguish fold shape, limb angles and bed age.Radiometric dating and cooling histories Half-lives, cooling rates and magnetic-polarity correlation with independent age tests.Geological time units How rock-unit ranks pair with intervals of geological time.Seismic impedance Impedance contrasts and reflection coefficients.Fossil preservation Reworking, fossil-range overlap, sample uncertainty and host-bed age interpretation.