Skip to Main content Skip to Navigation
Journal articles

Magnetostratigraphic study of the Melka Kunture archaeological site (Ethiopia) and its chronological implications

Abstract : A magnetostratigraphy is established for the Melka Kunture archaeological site of Ethiopia, whose chronological setting needed improvement. The magnetostratigraphy is constructed from four distinct stratigraphic sections, Garba-IV (5 sites), Gombore-I (21 sites), Gombore-II (8 sites), and Simbiro (13 sites). Natural remanent magnetizations (NRM) were measured and analyzed over a total of 214 specimens to isolate the characteristic components of magnetization and determine magnetic polarities. Two magnetization components were isolated in every sample analyzed: (i) a low-temperature (low coer-civity) secondary normal component and (ii) a high-temperature characteristic component of normal or reversed polarity and allows to identify five magnetozones (N1eR1eN2eR2eN3). Rock magnetic analysis attests that the magnetization is carried by magnetite or titanomagnetite within the range of pseudo-single domain grain sizes. Anisotropy of magnetic susceptibility (AMS) supports a sedimentary origin of the magnetic remanence. Based on recent 40 Ar/ 39 Ar geochronological dating of the site, faunal constraints and a magnetostratigraphic pattern, the sequence is correlated to the time between the early Matuyama chron (<1.80 Ma) and early Brunhes chron (w0.709 Ma) of the geomagnetic polarity time scale (GPTS). Completing recent 40 Ar/ 39 Ar age series, the magnetostratigraphy study presented here allows computation of interpolated ages for various faunal and artifact findings at Melka Kunture and similar fossiliferous deposits in the region.
Complete list of metadatas

Cited literature [46 references]  Display  Hide  Download

https://hal-amu.archives-ouvertes.fr/hal-01419589
Contributor : Nicolas Thouveny <>
Submitted on : Monday, January 16, 2017 - 8:58:43 AM
Last modification on : Wednesday, October 14, 2020 - 3:50:54 AM
Long-term archiving on: : Monday, April 17, 2017 - 2:25:22 PM

File

TAMRATetal-QUAT-INT-2014.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

Endale Tamrat, Nicolas Thouveny, Maurice Taieb, Jean-Philip Brugal. Magnetostratigraphic study of the Melka Kunture archaeological site (Ethiopia) and its chronological implications. Quaternary International, Elsevier, 2014, 343, pp.5-16. ⟨10.1016/j.quaint.2013.11.030⟩. ⟨hal-01419589⟩

Share

Metrics

Record views

440

Files downloads

787