Hilt's law

proper noun

A geological law stating that the deeper coal is found, the higher its rank (carbon content). It holds true when the thermal gradient is entirely vertical.

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Meanings

proper noun
  1. geographyA geological law stating that the deeper coal is found, the higher its rank (carbon content). It holds true when the thermal gradient is entirely vertical.

Origin

Observed by professor Carl Hilt (1873).

Full word history & related roots →
Cite this entry
APA

Hilt's law. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Hilt's%20law

MLA

“Hilt's law.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Hilt's%20law. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Hilt's law,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Hilt's%20law.

Source: Hilt's law on Wiktionary, CC BY-SA 4.0.