THE STRATIGRAPHIC AND ENVIRONMENTAL DISTRIBUTION OF ICHNOTAXA FROM THE PALAEOZOIC OF PORTUGAL

by C.NETO DE CARVALHO

    This data table presents the trace fossil distribution in the Palaeozoic formations of Portugal. The data was obtained from diverse bibliographic references as well as from author’s own observations and fieldwork carried in the last few years. Most of those bibliographic references can be found in Gondwana Palaeoichnology Bibliographical Index (Portugal), available in this web-site.

Upper Devonian - Lower Carboniferous?

 -/Terena/-, flyschoid deep marine deposits formed by alternating greywackes and mudstones with interbedded conglomerates, Planolites isp., Helminthopsis isp., Gyrochorte? isp., Protopaleodyction , isp..

Upper Silurian - Lower Devonian (Pridoli?-Gedinnian)

 -/Bando dos Santos/-, Upper offshore to confined shoreface siltstones and shales passing up to bioturbated sandstones, Skolithos isp., Planolites isp., Monocraterion isp., Cruziana isp..  

Lower Silurian (Llandovery)

 -/Aboboreira/-, Outer shelf euxinic black shales with graptolites, Nereites isp..

Upper Ordovician - Early Silurian (Caradoc?-early Llandovery)

 -/Colorada/-, Inner shelf quartzites and micaceous sandstones, Skolithos isp., Arenicolites isp..

Upper Ordovician (Caradoc)

 -/Cabeço do Peão/Queixopêrra, Upper offshore to shoreface micaceous and fossiliferous (bryozoan) mudstones, bioturbated psamites and oolitic ironstones, Planolites isp., Zoophycos isp., Palaeophycus isp., Chondrites isp., Bifungites isp., Bergaueria hemisferica, Diplocraterion isp., boreholes in orthid valves.

Middle Ordovician (middle Llandeilo)

 -/Fonte da Horta/-, Inner shelf siltstones and mudstones, Zoophycos isp..

(late Llanvirn)

 -/Monte da Sombadeira/-, Distal shelf to shoreface hummocky cross-stratification sandstone facies with interbedded mudstone/laminated siltstone facies, Planolites isp., Palaeophycus isp..

(Llanvirn)

 -/Cácemes/-, Lower offshore fossiliferous black shales, Tomaculum isp., Planolites isp..

Lower Ordovician - Middle Ordovician (late Arenig-lower Llanvirn)

 -/Valongo/-, Outer shelf fossiliferous black shales and siltstones, Tomaculum problematicum, Pinaceocladichnus perplexus.

 -/Armorican Quartzite/-, Tempestitic inner shelf sandstone facies passing up to mudstones and psamites alternating sequences, sometimes changing laterally to thick ferriferous units, Arenicolites isp., Arthrophycus alleghaniensis, Arthrophycus isp., Cruziana rugosa, C. furcifera, C. goldfussi, C. imbricata, C. rouaulti, Daedalus ispp., Didymaulichnus lyelli, Diplichnites isp., Gordia isp., Merostomichnites isp., Palaeophycus tubularis, P. ispp., Rosselia socialis, Rusophycus carleyi, R. ispp., Skolithos linearis, S. isp., Zoophycos? isp..

Lower Ordovician (late Arenig)

 -/Armorican Quartzite/-, Inner-outer shelf shale and siltstone sequences, with less common centimetric to decimetric storm quartzite beds, Cruziana furcifera, C. rugosa, C. goldfussi, Daedalus ispp., Dimorphichnus isp., Diplichnites isp., Monomorphichnus isp., Palaeophycus ispp., Planolites ispp., Rusophycus ispp., Skolithos isp., Arthrophycus alleghaniensis.

 -/Armorican Quartzite/-, Backshore to shoreface thick bedded quartzites and pebbly sandstones passing up to quartzitic and shale rythms, with uncommon carbonated sandstone beds, Arthraria isp., Arthrophycus isp., Cruziana rugosa, C. furcifera, C. goldfussi, Daedalus ispp., Planolites annularis, Monocraterion isp., Monomorphichnus isp., Skolithos linearis, S. isp..

 -/Barrancos/-, Outer shelf micaceous bioturbated shales, siltstones and psamites, Nereites jacksoni; N. ispp.; Phyllodocites saportai; Dictyodora? andrei; D.? bocagei; D.? lorioli; D.? ispp.; Lophoctenium geinitzi; Chondrites ispp.; Glokerichnus? isp.; Oldhamia pinnata; Zoophycos isp.; Palaeophycus cf. striatus; Palaeophycus ispp.; Gordia marina; Gordia ispp.; Phycodes isp.; Cochlichnus? isp.; aff. Didymaulichnus isp.; Megagrapton? isp.; Diplichnites isp.; Merostomichnites cf. strandi, Dimorphichnus? isp..

(Tremadoc)

 -/Sarnelha/-, Submarine fan/marginal fan delta polymictic breccio-conglomerates and lenticular sandstones passing up into shallow marine siliciclastic sediments, Daedalus isp., Arthrophycus isp., Cruziana isp., Skolithos isp..

Middle Cambrian-Upper Cambrian?

 -/Fatuquedo/-, Shallow marine sucession of green micaceous shales, siltstones and psamites including greywackes in the upper part, Skolithos isp., Arenicolites isp..

Cambrian

 -Douro/Montalto/-, Distal shelf turbiditic sequences of metagreywackes and slates, Monocraterion? isp.