Normal Fault

Normal Fault

High angle fault that results from extensional stress and forms a steeply dipping planar structure. Slip movement during an earthquake is vertical and down dip. The down-dropped block is called the hanging wall and the uplifted block is called the footwall.

Geothermal Glossary

Word of the Week – Mineral Geothermometer

Word of the Week – Mineral Geothermometer

Mineral Geothermometer A secondary mineral phase whose stability is defined by a lower and sometimes an upper temperature threshold. Common mineral geothermometers comprise clays, zeolites and epidote, with crystal structures that contain a hydroxyl (OH-) or water...

Word of the Week – Mud Pots and Mud Pools

Word of the Week – Mud Pots and Mud Pools

Mud Pots and Mud Pools Depressions filled with hot bubbling mud commonly associated with steaming ground. The mud is mostly made up of clay minerals which form as an alteration product and interaction between acidic condensed steam and rock-forming minerals.

Word of the Week – MWD

Word of the Week – MWD

MWD Refers to Measurement While Drilling which for directional drilling includes geospatial information that is used to steer the bottom hole assembly (BHA). Inclination and azimuth are surveyed using accelerometers and magnetometers which are incorporated into MWD...

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