3DTeLC Project 2017-1-UK01-KA203-036719

Submarine Geomorphological Features (Harris et al., 2014)

In April 1998 the Monterey Bay Aquarium Research Institute (MBARI) completed surveys of selected areas offshore of Santa Barbara, California. The EM300 multibeam survey covers the central and western section of the Santa Barbara Basin, which forms the northernmost part of the California continental borderland province.

https://walrus.wr.usgs.gov/geohazards/underlandslides.html Large submarine slides off southern California (outlined in small white dots). Nomikou et al., 2011

The major part of the central Gulf is a 800-870 m deep, 40km long, 9-12km wide, WNW-ESE elongate flat area. West of , the basin is shrinking towards its central run off axis, and finally diminishes at Rio-Antirrio straight. Eastwards the central basin terminates at the Alkyonides islets, east of which a sub-basin with maximum depth of 350 m is formed. The steep (30– 40%) southern margin of the basin between to Aigio, is incised by numerous small canyons. The northern margin dips gently till the 400m isobaths and becomes steeper between 400-800m. Swath Map of Western Korinth Gulf (Nomikou P. et al., 2011) Project 3Hazard, Sc.Res.V.Lykousis Salmenikos

Aigio

Eliki

Project 3Hazard, Sc.Res.V.Lykousis S.Alexandri , P.Nomikou, D.Ballas “Coastal hazard related to landslide distribution derived from morphotectonic analysis (SW Gulf of , )”

(Simou et al., 2014; 2016; 2017-in preparation) High-resolution multibeam bathymetry in combination with the available land surface data have contributed to submarine

Psathopyrgos and subaerial morphological Aigion mapping. These have been used as a basis for the detection of the most recent brittle deformation (fault structures) and all those geomorphic features that indicate

STUDY AREA instabilities probably triggered, (view from NE) directly or indirectly, by the ongoing tectonic activity. 3D model of the wider study area illustrating the major fault planes (red stripping) and the distribution of instabilities (green lines with ticks) in response to active faulting. The geological setting is applied to the narrow study area, following the 3D model of the study area corresponding to the Holocene and Plio- (view from NE) Pleistocene sediments (beige and yellow colours respectively) and the Pindos alpine (Simou et al., 2014; 2018) basement (green colour).

Geological setting of the Mariana Region. Modified from Martinez and Taylor (2003). 3D Visualization of Pagan Island. 3D Visualization of Saipan Bathymetry

3D Visualization of Guam

Commonwealth of Northern Mariana Islands (CNMI) and Guam

http://www.soest.hawaii.edu/pibhmc/cms/data-by-location/cnmi-guam/ (Papanikolaou et al.,2018-under review)

(Papanikolaou et al., 2015; 2018-under review) ACTIVE FAULT ZONES

(Papanikolaou et al.,2002)

Kos-Nisyros Volcanic field (Nomikou & Papanikolaou,2011) Identify the following submarine features: a) Basins b) Canyons c) Fault zones d) Landslides-debris avalanches e) Continental shelf f) Volcanoes Identify the following submarine features: (a) a continental shelf, (b) a continental slope, (c) a spreading ridge, (d) a subduction zone with a deep trench, (e) an abyssal plain, and (f) some isolated seamounts.

https://opentextbc.ca/geology/chapter/18-1-the-topography-of-the-sea-floor/