Next Article in Journal
A Continuous Palynological Record of Forest Clearing at Rano Kao (Easter Island, SE Pacific) During the Last Millennium: Preliminary Report
Previous Article in Journal
Varve Distribution Reveals Spatiotemporal Hypolimnetic Hypoxia Oscillations During the Past 200 Years in Lake Lehmilampi, Eastern Finland
Open AccessArticle

Holocene Sedimentary Record and Coastal Evolution in the Makran Subduction Zone (Iran)

1
Department of Earth Sciences, University of Geneva, Rue des Maraîchers 13, 1205 Geneva, Switzerland
2
Institute of Earth Surface Dynamics, Faculty of Geosciences and Environment, University of Lausanne, 1012 Lausanne, Switzerland
3
Exploration department, School of Mining Engineering, University of Tehran, Northern Kargaravn, P.O. Box 11365-4563, Tehran 15119-43943, Iran
*
Author to whom correspondence should be addressed.
Quaternary 2019, 2(2), 21; https://doi.org/10.3390/quat2020021
Received: 12 April 2019 / Revised: 21 May 2019 / Accepted: 5 June 2019 / Published: 12 June 2019
The western Makran coast displays evidence of surface uplift since at least the Late Pleistocene, but it remains uncertain whether this displacement is accommodated by creep on the subduction interface, or in a series of large earthquakes. Here, we address this problem by looking at the short-term (Holocene) history of continental vertical displacements recorded in the geomorphology and sedimentary succession of the Makran beaches. In the region of Chabahar (Southern Iran), we study two bay-beaches through the description, measurement and dating of 13 sedimentary sections with a combination of radiocarbon and Optically Stimulated Luminescence (OSL) dating. Our results show that lagoonal settings dominate the early Holocene of both studied beach sections. A flooding surface associated with the Holocene maximum transgression is followed by a prograding sequence of tidal and beach deposits. Coastal progradation is evidenced in Pozm Bay, where we observe a rapid buildup of the beach ridge succession (3.5 m/years lateral propagation over the last 1950 years). Dating of Beris Beach revealed high rates of uplift, comparable to the rates obtained from the nearby Late Pleistocene marine terraces. A 3150-year-old flooding surface within the sedimentary succession of Chabahar Bay was possibly caused by rapid subsidence during an earthquake. If true, this might indicate that the Western Makran does produce large earthquakes, similar to those that have occurred further east in the Pakistani Makran. View Full-Text
Keywords: Makran; coastal processes; coseismic subsidence; Holocene uplift; headland-bay beach; beach progradation; earthquake Makran; coastal processes; coseismic subsidence; Holocene uplift; headland-bay beach; beach progradation; earthquake
Show Figures

Figure 1

MDPI and ACS Style

Normand, R.; Simpson, G.; Herman, F.; Biswas, R.H.; Bahroudi, A. Holocene Sedimentary Record and Coastal Evolution in the Makran Subduction Zone (Iran). Quaternary 2019, 2, 21.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
  • Supplementary File 1:

    ZIP-Document (ZIP, 1337 KB)

  • Externally hosted supplementary file 1
    Doi: 10.5281/zenodo.2558320
    Description: Field pictures, radiocarbon dating analytical details, OSL dating analytical details.
Back to TopTop