hade

A geologist measures the hade of a mineral vein with a clinometer.

Definition

1. Noun:

   • Inclination from vertical: In geology and mining, "hade" refers to the angle or slope of a fault plane or mineral vein measured from the vertical plane.
   • Geological dip: It specifically denotes the deviation of a rock layer or fissure from a vertical orientation.

2. Verb:

   • To incline from vertical: In geology and mining, "hade" means to slope or deviate from a vertical line, typically describing the angle of a fault or vein.

Usage Examples

• Noun:

  • The miner measured the hade of the quartz vein before drilling. (The angle of the vein's slope from vertical.)
  • Geologists recorded a hade of 30 degrees in the fault line. (The fault plane inclined 30 degrees away from vertical.)

• Verb:

  • The mineral vein hades sharply to the east. (The vein slopes or inclines towards the east.)
  • This fault hades at an angle of 45 degrees. (The fault plane deviates from vertical by 45 degrees.)

Advanced Usage

• "hade of a fault": The angle between the fault plane and a vertical line drawn through the fault.

  • The hade of the fault was critical for predicting seismic activity. (The specific inclination of the fault plane.)

• "hade-slip": A type of fault movement where the hanging wall moves downward relative to the footwall along an inclined plane.

  • The earthquake was caused by a hade-slip along the pre-existing fracture. (Movement along a sloping fault.)

Variants and Related Words

• Hading (present participle/gerund): The act of inclining from vertical.

  • The vein is hading towards the surface. (The vein is sloping upward.)

• Haded (past tense): Describes a vein or fault that had a specific inclination.

  • The fault haded steeply before flattening out. (The fault sloped steeply initially.)

Synonyms

• Incline: to slope or lean from a straight line.
• Dip: the angle of a rock layer or fault measured from the horizontal (related but opposite; dip is from horizontal, hade from vertical).
• Slant: to deviate from a vertical or horizontal line.

Phrasal Verbs

• Hade into: to slope or merge into another geological feature.
  • The vein hades into the main fault system. (The vein slopes and joins a larger fault.)

Related Idioms

• "Hade and dip": A pair of terms used together in geology to describe the orientation of a rock layer or fault (hade from vertical, dip from horizontal).
  • The geologist recorded both the hade and dip of the stratum. (Both angles were measured for a complete orientation.)

Additional Notes

• Technical usage: "Hade" is a specialized term primarily used in mining engineering and structural geology. It is rarely used in everyday conversation.
• Historical context: The word originates from mining terminology in Cornwall, England, where it described the slope of lodes (mineral veins).