Geological Map of Athens Metropolitan Area
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470.000 475.000 480.000 485.000 Geological Map of Athens Metropolitan Area A compilation map based on: 500 a. Geological Map of Greece 1:50.000 of H.S.G.M.E., Athinai - Piraiefs Sheet (Gaitanakis, 1982), Athinai - Elefsis Sheet 35 (Katsikatsos et al., 1986), Kifissia Sheet (Katsikatsos, 2002) and Koropi - Plaka Sheet (Latsoudas, 2003) 300 400 b. Geological Tectonic Map of Athens Basin, in: Geological - geotechnical study of the Athens basin Pl-Pt (Papanikolaou et al., 2002) 20 c. Geological map of Hymettus by Coleman et al. (2020). d. Ground investigation data of ATTIKO METRO S.A. Supplementary map to the paper: Kifissos r. Ekali Boronkay, K., Stoumpos, G., Benissi, M., Rovolis, G., Korkaris, K., Papastamatiou, D., Dimitriou, G., Chrysikopoulou, A., Miliotis, I., Giakoumis, A., Novack, M. and Marinos, P. (2021), Geological Map 40 of Athens Metropolitan Area, Attica (Greece): A review based on Athens Metro ground A investigation data. Bulletin of the Geological Society of Greece, 57, 68-126. A Nea Erythrea 600 The topographic base map originates from Hellenic Statistical Authority. Greek grid 200 (ΕΓΣΑ87) coordinates. 700 Coastline and contours from ATTIKO METRO S.A. 400 Chelodonou t. Scale: 1:25.000 500 A 0 500 1.000 2.000 m A Q.al Politia Contour interval 20 m 15 400 Pl-Pt 4.215.000 4.215.000 Ano Liosia 25 10 15 Acharnes 10 25 20 300 Kefalari Pl-Pt Q.al Kokkinaras t. P e n t l i k o m A UM Kifissia UM 35 Lykovryssi A UM A UA Kamatero 100 25 A Metamorphosi Melissia UA UM Maroussi 400 A UM 300 UA Iraklio 30 35 SM Paradissos Pl-Pt Pl-Pt Nea Ionia SM Vathyrema t. Pl-Pt Diilistiria Petroupoli Ano Vrilissia 25 UM SM P i k i l o m t 4.210.000 4.210.000 UM CL 20 UM Podoniftis t. Pl-Pt Nea Philadelphia Aghii Anargyri Vrilissia Podoniftis t. Aghios Ierotheos Ilion Perissos CL 300 200 Nea Chalkidona Chalandri t. UA CL CL Q.al UM Anthoupoli Pl-Pt Filothei CL Chalandri Gerakas CL Filothei t. SM Dassos UA Patissia Pl-Pt UM Dafni 100 Pl-Pt A 100 200 Galatsi Attica-Evia Fault Aghia Paraskevi CL CL Psychiko ? UA Peristeri 48 UM 80 48 UM 64 CL UA CL 50 Tourkovounia Chaidari UA 36 CL Sepolia 50 58 A Pl-Pt CL CL 72 49 Cholargos Attiko Alsos 66 Neo Psychiko 30 37 A 30 35 Kifissos r. Kypseli 58 UA UA A Kolonos 400 E g a l e o m t UA UA 57 UM Akadimia Platonos Pl-Pt 20 200 UM 4.205.000 52 Egaleo 4.205.000 300 30 UA 36 UA Kyklovoros t. Aghia Varvara Strefi h. 200 Ambelokipi SM Papagou UM Pl-Pt 35 Exarchia CL Goudi Metaxourgio Lycabettus 35 85 UA SM Pl-Pt Votanikos CL Korydallos Athens CL67 Pl-Pt Neapoli 40 35 Rouf CL 30 Keramikos UA Kolonaki UA Zografou 200 25 LA 30 70 25 Pl-Pt CL 300 400 100 30 80 Q.al UA UA 500 Legend Kifissos r. 28 Acropolis Pagrati 600 Eridanos t. Nikea 35 32 CL SM Ilissos r. Symbols Amfiali Tourkovouni h. UA Q.al 40 58 52 Panepistimioupoli Filopappou Ardettus 58 Bedding (or foliation) and dip Q.al LA 50 85 Ilissos r. Tavros 85 63 Koukaki Kessariani 52 Aghios Ioannis Rentis Pl-Pt 55 UA 75 Fold axis: anticline / syncline 36 65 A 25 32 63 UA 51 84 33 Kokkinia 42 54 Normal, oblique normal fault (certain / probable) Keratsini Karavas52 h. 26 Detachment (certain / probable) 30 CL 10 Vyronas 50 38 Pl-Pt Neos Kosmos 40 Thrust / décollement (certain / probable) Tambouria Kaminia 35 Attica-Evia Fault (certain / probable) CL H y m e t t u s m t Kalithea LPl UA River 24 Q.al Torrent CL 50 A l i p Moschato UA Daphni Artificially by-passed drainage axis A e LPl Kareas 21 LPl d 4.200.000 Q.m 4.200.000 o Q.al A 40 n Stratigraphy A UA 17 Piraeus HOLOCENE Nea Smyrni Anthropogenic deposits: mainly coarse-grained soils from quarries, deposited excavation materials etc. A A Kastella h. QUATERNARY (undifferentiated) Q.al Alluvium: loose, brown, sandy - clayey soils with sparse gravel. 10 UA Pl-Pt Q.m Marsh deposits: soft, grey to dark grey, clay and loose silty fine sand. Amfithea Pl-Pt Coastal deposits: grey, silty sand, locally with conglomerate and grit (beach rock), with abundant marine fossils (mainly Lamellibranch and secondarily Gasteropods). 25 16 Ilioupoli Q.al PLIOCENE - PLEISTOCENE 40 700 Fluvio-terrestrial deposits: red clay and silt, alternating with clayey gravel. LPl Pl-Pt LPl 45 LPl Alluvial fan: red conglomerate, with cobbles and boulders near the source area, with intercalations of red claystone and siltstone. 10 Aghios Dimitrios 12 45 LOWER PLIOCENE Piraeus marl: thinly bedded, light grey, marly limestone and marl with sandstone and siltstone intercalations. At the base, calcareous conglomerate with sandstone LPl LPl and sandy marl alternations. The formation is rich in marine fossils (mainly Lamellibranch and secondarily Gasteropods, Charalambakis, 1951). 12 24 Paleo Faliro Pikrodafni t. UPPER MIOCENE Lacustrine deposits: light yellow marl (approx. 40 m thick) that transition at depth to grey, calcareous siltstone. Several lignite intercalations -sometimes reaching 25 100 UM 24 LPl thickness of a few meters- are found within the lower siltstone formation. LPl LPl P E L A G O N I A N Athens Unit 10 Pl-Pt UPPER CRETACEOUS Q.al Crest Limestone: massive, grey to white, locally intraclastic and karstic, limestone, with fragments and complete sections of Rudists, fragments of Corals and Echinoderms, Argyroupoli CL Gasteropods, Crustaceans, Shellfish, microfossils etc 1 (Cenomanian to Turonian and Upper Senonian) (Marinos et al., 1971). Athens Sandstone-Marl Series: thinly bedded, grey or brownish-yellow, locally karstic, marly limestone and reddish-brown, often calcareous sandstone alternations, with SM grey, calcareous conglomerate, thinly bedded, greyish-white, locally intraclastic limestone, various coloured claystone and rarely siltstone intercalations. Limestone within Athens Sandstone-Marl Series: grey, thin-bedded, locally karstic limestone, marly limestone. Upper Athens Schist: alternations of greyish-green metasandstone and brownish-green metasiltstone with local intercalations of crystalline limestone, phyllite, schist 25 CL UA (calcareous / sericitic / epidote-chlorite), with frequent lenses and thin veins of quartz, with veinlets of calcite and locally altered, with impregnations of oxides. Limestone within Upper Athens Schist: grey, massive, locally karstic, limestone or crystalline limestone. Alimos 35 Lower Athens Schist: alternations of grey to dark grey metasiltstone, often calcareous, metasandstone and black clayey shale, with local intercalations of thin talc 12 LA schist. S a r o n i c g u l f CL 1 Fossils found within all limestone formations of Athens Unit. UPPER CRETACEOUS UA Limestone: medium bedded to massive, grey or brownish grey when ferrous, crystalline, locally karstic limestone, with fragments and complete sections of Rudists, fragments of Corals and Echinoderms, Gasteropods, Crustaceans, Shellfish, microfossils etc (Cenomanian to Turonian and Upper Senonian) (Marinos et al., 1971). TRIASSIC Limestone: light to dark grey, biomicritic, thick-bedded to massive, locally karstic limestone. Dolomite and dolomitic limestone are also encountered. UPPER PALEOZOIC 4.195.000 UA Shale and sandstone: grey, greenish grey, redish, sericitic, intercalated with quartz conglomerate. The upper members exhibit limestone intercalations. 4.195.000 A T T I C - C Y C L A D I C C O M P L E X Alepovouni Unit MESOZOIC (?) 20 LPl Alepovouni Marble: thick bedded to massive, pink or geyish-white, fine-crystalline, often ankeritic, locally dolomitic, locally karstic, marble. The formation is severely fractured with dense secondary calcite and Fe-oxide veins. A Alepovouni Phyllite: brown, phyllite (mineral assemblege: calcite + sericite + chlorite + white mica + quartz + plagioclase ± tourmaline ± epidote, Coleman et al., LPl Aghios Kosmas 2020), often calcareous, with beds of thin bedded, ankeritic, silicified, marble, quartz lenses and greenstone. Severely fractured formation. Basal Unit Pl-Pt UPPER PALEOZOIC - MESOZOIC Kessariani Marble: white, calcite marble. Kessariani Schist: calcite-chlorite-graphite-quartz-white mica ± feldspar ± chloritoid schist (metasedimentary) and epidote-chlorite-graphite-albite-white mica ± feldspar schist (metavolcanic) with white marble intercalations (mineral assemblages by Coleman et al., 2020). Kessariani Dolomite: dolomitic marble. Lower Marble: calcite marble. Pirnari Marble: medium to dark grey, variably carbonaceous, dolomitic marble. A U L T R A - B A S I C and B A S I C R O C K S (in all units) Elliniko Serpentinite: dark green, frequently severely altered, serpentinite, locally with intercalations of crimson mudstone. At Vyronas and Ano Ilioupoli districts, at the contact with Alepovouni Marble, they alter due to metasomatism to rusty-orange listwanite. Ultra-basic and basic magmatic rocks are found at the base of Athens Schist, at the contacts of Alepovouni Unit, as well as within Kessariani Schist. Within Athens Schist, altered spillitic rocks and diabase are encountered (mineral assemblage: secondary calcite + chlorite + epidote + green hornblende + quartz ± magnetite ± leucoxene, Marinos et al., 1971). 470.000 475.000 480.000 485.000.