The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Diopatrichnus santamariensis nov. isp. from lower Pliocene sediments on Santa Maria Island in the Azores Archipelago (mid-North Atlantic) represents the third ichnospecies of Diopatrichnus Kern, as characterized by a vertical or inclined tube armoured mainly by bivalve shells that are mostly perpendicular to the burrow axis and concave-upward. The polychaete Owenia (family Oweniidae) is favoured as...
The trace fossil Macaronichnus segregatis is interpreted to be produced by opheliid polychaetes that feed on epigranular microbes and organic matter commonly abundant in shallow-marine foreshore sands. Resulting traces are horizontal and typically random in orientation, but sometimes perpendicular to the shoreline. However, M. segregatis in Neogene sandy sediments from Santa Maria Island in the Azores...
A bed-by-bed ichnological analysis at the classic Bottaccione section (Gubbio area, Italy), reveals an unusual response of ichnofauna to the environmental changes associated with the Cretaceous-Paleogene (K-Pg) boundary event. The trace fossil assemblage, consisting of Chondrites isp., Planolites isp., Thalassinoides isp., Trichichnus isp., and Zoophycos isp., is similar to that registered during...
Ichnogenera belonging to cleft-foot and wedge-foot bivalves can in most cases be distinguished. This paper addresses the taxonomy of locomotion traces made by wedge-foot bivalves. Ichnogenera Ptychoplasma Fenton and Fenton and Oravaichnium Plička and Uhrová are reviewed together with related ichnotaxa. Both are interpreted as the locomotion traces of non-cleft, wedge-foot bivalves. Both are usually...
In this paper we present the effects of different tracemakers on the redistribution of calcareous nannofossils throughout the K-Pg boundary at the Bidart section (SW France), along with their consequences for our knowledge of the K-Pg boundary event. Danian calcareous nannofossil assemblages are present in Maastrichtian samples due to infiltration into dark trace fossil infillings proceeding from...
Detailed field observations across and along the Cretaceous-Palaeogene (K-Pg) boundary interval in the Caravaca section, SE Spain, together with laboratory analyses reveal a well-developed lowermost Danian dark-colored trace fossil assemblage. The trace fossils range continuously from the bioturbated horizons in the dark boundary layer (lowermost Danian), to the uppermost Maastrichtian sediments....
In the Sandikli region of the Taurus Range of Turkey, greater than 3000 m in thickness metamorphosed siliciclastics and volcanics (Kocayayla Group) underlies the trilobite-and conodont-bearing Middle-Late Cambrian Hudai Quartzite and Caltepe Formation.The Kocayayla Group, previously regarded as Infracambrian or Precambrian, is dated for the first time as Early Cambrian on the basis of trace fossils...
Tiering patterns of trace fossils in flysch deposits are diversified. They are controlled mainly by the degree ofoxygenation of the sediment and the sedimentation rate. With respect to depth of burrowing, multi- and singlelayer colonizers of newly deposited turbidite layers are distinguished. The multi-layer colonizers begin to colonize the newly deposited turbidite layer from the deepest tiers.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.