Definition of diachronism in English:

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Pronunciation: /dʌɪˈakrənɪz(ə)m/


[mass noun] Geology
The occurrence of a feature or phenomenon in different geological periods.
Example sentences
  • This is interpreted to reflect both diachronism in fault reactivation and variable distance from source area to sub-basin, causing variable delays between basin-margin faulting and clastic deposition in the basin.
  • A typical example of diachronism would be a sequence of beds deposited in a shallow sea that gradually encroaches upon the land.
  • Therefore, this flexural model could provide an explanation for the above mentioned diachronism.



Pronunciation: /dʌɪˈakrənəs/
Example sentences
  • The scattered nature of the outcrop and the possibility of diachronous volcanism mean that all rocks grouped as Dokhan Volcanic Series may not be coeval.
  • Thirlwall proposed a diachronous end to magmatism from NW to SE across Scotland and NE England.
  • The parallel retreat of slopes through time in the Penck scheme means that the age of the pediplain is time-transgressive or diachronous, that is, the age varies across the surface of the pediplain.


Example sentences
  • The total length of rifted margin was more than 25,000 km, suggesting a staggered climatic response to uplift as rifting progressed diachronously, somewhat like a zipper.
  • It is during this interval that graptolitic shales are diachronously replaced by shelly, Hirnantia Fauna-bearing limestones, first in the shallower-water and later in the deeperwater portions of the Yangtze Platform.
  • Despite their proximity, individual basins developed diachronously and did not share basin-bounding faults.

For editors and proofreaders

Line breaks: di¦achron|ism

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