Pronunciation: [hˈe͡ɪd] (IPA) 
The word "Hade" is spelled with the letters h-a-d-e. In IPA phonetic transcription, it is pronounced as /heɪd/. The "h" at the beginning represents a voiceless glottal fricative sound, while "a" is pronounced as "ey" diphthong. The "d" is a voiced alveolar stop followed by an unvoiced "e" pronounced as a schwa sound. "Hade" can refer to the inclination or angle of a geological layer, and is commonly used in the field of geology.
Hade is a geological term that refers to the angle between a fault plane or rock layer and a horizontal surface. It indicates the slope or inclination of the rock formation. The term is particularly relevant in structural geology, mining, and engineering disciplines.
Hade is commonly measured in degrees and is determined by the relative position of the rock layers or fault planes with respect to a horizontal reference plane. A positive hade indicates that the formation is inclined downwards, while a negative hade signifies an upward inclination. The angle's magnitude can range from 0° (horizontal) to 90° (vertical).
Understanding the hade of fault planes is crucial in analyzing seismic activity, studying tectonic movements, and assessing the stability of rock formations. It allows geologists to determine the direction and magnitude of faulting or folding, assisting in predicting potential hazards such as earthquakes. Engineers also consider the hade of rock layers when designing tunnels, slopes, or excavations, as it affects stability and geotechnical properties.
The term "hade" has its roots in Middle English and Old English, denoting "inclination" or "slope." It has been widely adopted in geological literature and is extensively used by professionals in the field to communicate specific information regarding the orientation and arrangement of rocks and fault planes.
• Among miners, the steep descent of a shaft; the inclination or deviation from the vertical position of a mineral vein.
• To deviate from the vertical; to slope, as a fault, vein, or lode.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "hade" has its origins in Middle English and Old English. Its etymology can be traced back to the Old English word "hād", which meant "hood, cover, or garment". This Old English term can be further connected to the Proto-Germanic word "haidus", with a similar meaning of "cover" or "hood". Over time, the word "hade" evolved, shifting in meaning, and is now primarily used in geology to refer to the inclination or angle at which a mineral vein or fault is inclined from the vertical.
