Definition of diachronism in English:
diachronism
noun dʌɪˈakrənɪz(ə)mdīˈakrəˌnizəm
mass nounGeology The occurrence of a feature or phenomenon in different geological periods.
Example sentencesExamples
- A typical example of diachronism would be a sequence of beds deposited in a shallow sea that gradually encroaches upon the land.
- Comparison of the thickness of lithostratigraphic units between sites appeared problematic because of the apparent diachronism of the lithostratigraphic boundaries and of the lateral changes of porosity.
- 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.
- Therefore, this flexural model could provide an explanation for the above mentioned diachronism.
- The diachronism could be due to discontinuities in the vertical record of fossils.
Derivatives
adjective dʌɪˈakrənəsdaɪˈækrənəs
Geology (of a feature or phenomenon) occurring in different geological periods.
key species are strongly diachronous across the region
Example sentencesExamples
- 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.
adverbdʌɪˈakrənəslidaɪˈækrənəsli
Geology 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.
Example sentencesExamples
- Despite their proximity, individual basins developed diachronously and did not share basin-bounding faults.
- 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.