1311
1185
1131
984
982
931 924
916
877
872 827
808
808 804
777
730 616
611
566
564
1331
1273 1262
1186 1177
1177 1121
1119 1111
1098
1080 1172
1065
1054 1043
1002
1001
Albaretta
Baisse du Pape
Blanchières
Braus
l e Petit Caire de Braus
Candaniel
Cime de la Graye Cime
de la Plastra
Cime de Ventabren
Cime du Farguet Cime du
Grand Braus
Cime du Petit Braus Clarissia
Col de Braus
Col de Faravel Col de l'Ablé
Col du Cavalier Croix
de la Plastra
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les Camps les Prats
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Mont Brec Mont l'Ablé
Mont Panard
Mont Pissandrous
Mont Pivora Mont
Saint-Michel
Morguetta
Mortisson
Pas de l'Agrée
Pierre-Feu Pierre-Feu
Pifourchier Pin
éa
Plan Constant
Pont des Moulins
Ravin
Ravin Ravin
Redebraus Reveira
Roccaniera
de Roc
her
Graya
Rocher de Pianastan
Ruisseau Ruis
seau
Ru isse
au
Ruisseau
Saint Laurent
Sca letta
Source de Pissaour
Touët de l'Escarène
Tête de la Lavina Vallon
Vallon Vallon
Vallon Roussillon
Villatalla
de
Redebraus
de du
Auri Mont
de
de
d'Estiou
Braus de
Vallon
de
Parais
Rochers de Saint Sauveur Crê
te de
Nice
Sospel
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Ruisseau de Redebraus 800 m
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C’
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cbm cbm
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num mgb
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TET
MOS 1300 m
1200 m 1100 m 1000 m 900 m 800 m 900 m
800 m 700 m
600 m
A
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Cime du Grand Braus
Lucéram Ruisseau de Felavel
Roccaniera
cbm
cbm
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num
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800 m 700 m 600 m 500 m
400 m
B W
1100 m 1000 m 900 m 800 m 700 m
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Cime de la Plastra
le Paillon
Ravin du Mont Auri
le Planchet
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G
GE EO OL LO OG GIIC CA AL L M MA AP P O OF F T TH HE E C CO OL L D DE E B BR RA AU US S A AR RE EA A ((M MA AR RIIT TIIM ME E A AL LP PS S,, S SE E F FR RA AN NC CE E))
S
Sccaallee 11::1100,,000000
Geological sections
(scale 1:10,000)bre
mcf ant
all
num numc gma
lsa
grv
kim cbm
mal
tit gra slm
claclao
mjl cal oxf ugc deb
Topographic base redrawn on the SCAN 25® EDR map (1:25,000 scale) of the French National Geographic Institute (IGN), sections 100_78 and 100_79 Coordinate System: NTF (Paris) / Lambert zone II extended
0 500 1000 1500 m
Scale 1: 10,000
LITHOSTRATIGRAPHIC UNITS
QUATERNARY DEPOSITS
Anthropogenic deposits
Undifferentiated alluvial deposits
Slope and talus debris
Cemented talus breccias
Landslide accumulations
ALPINE FORELAND BASIN SUCCESSION
Globigerina Marl
Dark-grey silty marls, light-grey to yellowish on the weathered surface, with abundant planktonic foraminifera and rare bivalves; cm- to dm-thick bedding, commonly obliter- ated by intense bioturbation. In the map area, only the lower part of this unit crops out (15–20 m).
Slope sediments. LATE BARTONIAN P.P.–PRIABONIAN
Nummulitic Limestone
- Medium-bedded, medium- to fine-grained allochemic sandstones and siltstones, with Nummulites, bivalves, gastropods, solitary corals, echinoids, scaphopods, and Teredolites-bored wood fragments, passing upward to an alternation of intensely bioturbated, fine-grained allochemic sandstones and calcareous marls. Locally, at the top, dm-thick interval of fine-grained, glaucony-bearing hybrid arenites with cold- water colonial corals (Col de Braus syncline) (numc). Thickness: 8–10 m. Outer-ramp deposits.
- Medium- to coarse-grained quartzarenites passing upward to medium- to fine- grained bioclastic–lithic arenites, with Nummulites, ostreids, echinoids and rare soli- tary corals, in thick to very thick beds, with erosional base and normal gradation. This interval rests on a transgressive erosional surface, locally covered by a cm- to dm- thick conglomerate lag. Thickness: 25–30 m. Inner- to middle-ramp deposits.
BARTONIAN P.P.
Microcodium Formation
- Medium- to coarse-grained, thick-bedded quartzarenites, with erosional base, clay chips, trough cross-stratification, and cm-thick conglomerate beds (southwestern part of Col de Braus syncline), locally bioturbated (Ophiomorpha burrows). Coastal deposits.
- Silty marls, with dm-thick, lens-shaped bodies of clast-supported conglomerates and dm-thick beds of quartz-rich arenites with reworked glaucony grains (northeastern side of l’Escarène syncline; Mont Brec). Alluvial plain sediments with channellized fluvial deposits.
- Polygenic, clast-supported conglomerates, with marly limestone and limestone clasts (locally encrusted by Microcodium) mainly derived from the underlying Upper Cretaceous succession, with arenitic or marly matrix with Microcodium fragments (southern part of Col de Braus syncline; l’Escarène; Blanchières). Alluvial fan–fluvial deposits.
Thickness: 0–15 m. LUTETIAN? – EARLY BARTONIAN
JURASSIC–CRETACEOUS PROVENÇAL SUCCESSION
Caire de Braus Marl
Alternation of medium- to thick-bedded marls and marly limestones, commonly bioturbated (Zoophycos), with Inoceramus sp., echinoids, planktonic foraminifera and rare ammonite molds. In the uppermost 100 m, thin resedimented beds of bioclastic packstones with planktonic foraminifera and glaucony, with erosional base, normal grading and parallel lamination. Thickness: 350 m.
Hemipelagic sediments, with interbedded gravity flow deposits. LATE CONIACIAN P.P.–MIDDLE CAMPANIAN
Mont Auri Limestone
- Medium-bedded limestones (bioclastic wackestones and packstones), with grey- coloured chert nodules, echinoids (Micraster sp., Holaster sp.), and bivalves (Inoceramus sp.). In the upper part, thin- to medium-bedded, resedimented glauconitic lithoarenites and hybrid glauconitic arenites, with erosional base, imbricat- ed clay chips, normal grading, parallel lamination, and, locally, cm-thick basal lag of Inoceramus fragments.
- Marly limestones (planktonic-foraminifera mudstones and wackestones) with thin marl interbeds.
Thickness: 300 m. Hemipelagic sediments, with interbedded gravity flow deposits.
TURONIAN–LATE CONIACIAN P.P.
Saint Laurent Marl
Grey, clayey–silty marls, with dm-thick marly limestone interbeds more and more thick and frequent towards the top of the unit. Fossils abundant in the lower part:
ammonites (Mantelliceras saxbii, Schloembachia subvarians, Puzosia mayoriana, Hypoturrilites sp., Eucalycoceras sp., Turrilites costatus, Newboldiceras sp., Cunningtoniceras cunningtoni, Acanthoceras rhotomagense, Calycoceras sp., Phylloceratinae), terebratulids, belemnites (Neohibolites sp.), echinoids (Camerogalerus cylindricus, Holaster subglobosus), and bivalves (Inoceramus sp.).
Thickness: 60–80 m.
Slope sediments. EARLY CENOMANIAN P.P.–LATE CENOMANIAN
Grès Verts
- Bioturbated glauconitic marly limestones, in dm-thick beds, with ammonite molds (Puzosia sp.) and echinoids. Thick-bedded hybrid glauconitic arenites and glauconarenites, commonly bioturbated, with large-scale cross-stratification and dm- sized, brownish carbonate concretions. At the top, dm-thick bed of bioturbated, fossil- and glaucony-rich calcareous marl with early Cenomanian (saxbii Subzone) ammo- nites (Mantelliceras picteti, M. mantelli, M. cantianum, M. tuberculatum, large macroconchs of Puzosia sp., Schloembachia sp.), echinoids (Protocardiaster sp., Camerogalerus sp.), brachiopods, belemnites, bivalves, and lamniform selachian teeth. Thickness: 20–40 m. Condensed shelf deposits.
- Alternation of glaucony-rich dark marls and marly limestones, with ammonites (Lithancylus sp.) and nautiloids (Paracymatoceras sp.). At the top, mineralized hard ground (HG3) followed by a dm-thick bioclastic–lithoclastic conglomerate bed (west of Col de Braus). Thickness: 8–10 m. Hemipelagic sediments.
EARLY APTIAN P.P.–EARLY CENOMANIAN P.P Clarissia Formation
- Condensed interval: glauconitic–phosphatic limestones (120–140 cm, with Moutoniceras sp. and belemnites), bioclastic–lithoclastic conglomerates (50–60 cm) and glauconitic limestones (50–60 cm). Conglomerates contain reworked ammonites (Barremites difficilis, Hypophylloceras ponticuli, Pseudohaploceras matheroni, Pachyhemihoplites contei, P. dardeaui, Martelites sp., Gassendiceras alpinum, Peirescites sp., Heinzia sayni, Gerhardtia provincialis, G. sp., Coronites darsi, Kotetishvilia sauvageaui, Hemihoplites feraudianus, H. astarte, H. soulieri, H. sp., Imerites giraudi, Heteroceras baylei, H. emerici, Argvethites sp., Audoliceras sp., Macroscaphites sp., Emericiceras sp., Camereiceras sp., Lytoceras sp.), belemnites, nautiloids (Cymatoceras sp.), brachiopods, gastropods, bryozoans, and wood frag- ments (Clarissia, Roccaniera). This interval thins out toward the south (60–70-cm thick at Saint Laurent; cm-thick bioclastic–lithoclastic lag at Albaretta).
- Medium-bedded, glauconitic limestones and marly limestones, with Duvalia sp., Cruasiceras cruasense, Crioceratites sp., Cymatoceras sp., passing upward to thin- bedded bioclastic mudstones and wackestones with cm-thick marly interbeds, con- taining Crioceratites sp., Toxaster sp., and belemnites. Mineralized hard ground at the top (HG2). Thickness: 12–20 m.
- Bioturbated wackestones and packstones rich in mixed Fe-oxide–phosphate ooids, with reworked cephalopods (Acanthodiscus sp., Lytoceras sp., Phylloceratidae, Cymatoceras sp.), belemnites (Duvalia sp.), echinoderms, brachiopods, bivalves, and fish teeth. Thickness: 0–1 m. (clao)
- Mineralized hard ground (HG1), locally encrusted by serpulids and ferruginuos microstromatolites, with cm-thick lag deposit made up of mineralized intraclasts and bioclasts (Hypophylloceras ponticuli, Cymatoceras sp., belemnites).
Condensed shelf deposits. EARLY HAUTERIVIAN P.P.–EARLY APTIAN P.P.
Cime de la Graye Limestone
Medium to thick, light-grey to beige limestone beds, commonly with erosional base, showing the following internal lithofacies organization (shallowing-upward peritidal cycles): bioclastic packstones/rudstones (2–10 cm); bioturbated, peloidal–bioclastic mudstones/wackestones (20–100 cm); laminated mudstones with fenestral porosity, mm-sized black pebbles, mud cracks, and flat-pebble breccias (10–40 cm). Locally, very thin beds of greenish marls and nodular mudstones with greenish marl matrix, and dm-thick beds of bioclastic wackestones/packstones with Clypeina jurassica and miliolids. Thickness: 18–25 m.
Peritidal and lagoonal deposits. EARLY BERRIASIAN P.P.–LATE BERRIASIAN
Cime de la Graye Limestone and Clarissia Formation (undifferentiated)
In the eastern sector (Cime de Ventabren, Vallon du Parais), the two units are reduced to a few metres of thickness each and have been represented as a unique cartographic unit.
Tithonian limestones
Light-grey massive limestones (bioclastic–oncoidal–ooidal packstones, grainstones and rudstones, and locally coral boundstones), with nerineid gastropods, thick- shelled bivalves, corals, echinoderm fragments, calcareous red and green algae, benthic foraminifera. Crinoid-rich grainstones (uppermost metres). At the top, dm- thick conglomerate bed with rounded, cm-sized reddish intraclasts in a Fe-oxide-rich packstone matrix with mm-sized authigenic quartz crystals, referable to an emersion episode. Thickness: 80 m.
Shallow-water carbonate platform deposits. TITHONIAN P.P.–EARLY BERRIASIAN P.P.
Kimmeridgian limestones
Light brown, massive limestones (bioclastic wackestones to packstones and grainstones, bioclastic rudstones), with a grey colour on weathered surfaces. Abun- dant reddish-brown chert nodules, aligned along dm-spaced layers, give the rock a bedded appearance. Thickness: 70–80 m.
Open-platform deposits. KIMMERIDGIAN–TITHONIAN P.P.
Oxfordian limestones
Brown to dark grey, thin- to medium-bedded limestones (bioclastic mudstones to wackestones and minor bioclastic packstones), with belemnites, crinoids, bivalves, gastropods, ammonites, solitary corals, and benthonic foraminifera. Thickness:
40–50 m.
Outer open-platform deposits. MIDDLE–LATE OXFORDIAN
Callovian dolostones
Light brown to beige, medium to coarsely crystalline dolostones (locally sucrosic), in dm-thick beds, without any fossils or internal structures preserved. Thickness: 80 m.
Carbonate platform deposits. CALLOVIAN
Middle Jurassic limestones
Medium- to thick-bedded limestones (packstones/grainstones and rudstones with oncoids, ooids, bioclasts and intraclasts), locally showing a selective dolomitization of the matrix, alternating with medium to coarsely crystalline dolostone beds. In the map area, only the upper part of this unit crops out (about 20–30 m thick), cut at the base by the Touët de l’Escarène Thrust.
Shallow-water carbonate platform deposits. BAJOCIAN–BATHONIAN
32
38
a
b
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A
A’
LUCA BARALE (1), ANNA D’ATRI (1), FABRIZIO PIANA(2)
(1) Università di Torino, Dipartimento di Scienze della Terra, Via Valperga Caluso 35, 10125 Torino, Italy. E-mail: luca.barale@hotmail.it (2) Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche, Via Valperga Caluso 35 - 10125 Torino, Italy
N
S
E W
© Journal of Maps, 2015
5.60 gr 5.61 gr 5.62 gr 5.63 gr 5.64 gr 5.65 gr
5.59 gr 5.58 gr
5.57 gr 7° 21' 7° 22' 7° 23' 7° 24' 7° 25'
48.70gr48.71gr43°50'43°51'
5.60 gr 5.61 gr 5.62 gr
5.59 gr 5.58 gr
5.57 gr 7° 21' 7° 22' 7° 23' 7° 24'
5.63 gr 5.64 gr 7° 25' 5.65 gr
In black: latitude and longitude from the Greenwich meridian (degrees)
48.72gr48.73gr48.74gr48.75gr48.76gr
48.77gr 43°52'43°53'
43°54'
48.70gr48.71gr48.72gr48.73gr48.74gr48.75gr48.76gr 43°50'43°51'43°52'43°53'48.77gr 43°54'
SYMBOLS
strike and dip line of bedding (dip values in degrees)
strike and dip line of overturned bedding (dip values in degrees)
axis of mesoscale fold (plunge value in degrees)
faults (a), and their concealed or inferred prosecution (b)
thrusts (a), and their concealed or inferred prosecution (b) (ROT, Rocca Serra–Ongrand Thrust; TET, Touët de l’Escarène Thrust)
anticline axial surface lines (ESA, l’Escarène anticline; MAA, Mont l’Ablé anticlyne)
syncline axial surface lines (CBS, Col de Braus syncline; CPS, Cime de la Plastra syncline; MOS, Mortisson syncline; ESS, l’Escarène syncline)
traces of the geological sections
fossiliferous sites
Lucéram arsenic mine: portal of the main gallery
In blue: latitude and longitude from the Paris meridian (grades)
References:
Rouire J., Autran A., Prost A., Rossi P., & Rousset C. (1980). Carte Géologique de la France à 1:250.000, feuille 40 Nice [Geological Map of France at 1: 250,000, sheet 40 Nice]. Orléans: BRGM.
Ligurian sea
Nice
25 Km
Dauphinois Domain
Briançonnais Domain Piemontese Domain
External Crystalline Units (Argentera Massif) Ligurian Flysch Units Quaternary deposits
Cuneo
see structural
scheme
mcf
mcf
mcf mcf
4 Km
5 4 3 2 1 Drap
Monaco
Menton Sospel
ROT RO
T
Nice Arc
Roya Arc
Structural scheme of the southwestern Maritime Alps (modified from Rouire et al., 1980) 1: Upper Triassic evaporites. 2: Jurassic-Lower Cretaceous Provençal succession. 3:
Upper Cretaceous Provençal succession. 4: Alpine Foreland Basin succession. 5: Cap d’Ail volcanites.ROT: Roccaserra-Ongrand Thrust. The dashed line indicates the area rep- resented in the geological map.
Hillshade: Carte du relief IGN (http://geoportail.fr/url/7F7Kuq) ITALY
FRANCE CH
Provençal Domain
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