A new assemblage of large insect trace fossils is recognized in paleosols the middle Miocene pyroclastic deposits from extra-Andean north Patagonia. This includes Racemusichnus jacobacciensis igen. isp. nov., largest fossil attributed to solitary insects. R. represented by clusters two seven thickly walled cylinders horizontally orientated paleosol. The cluster arrangement, its orientation, siz...

The up to 304 m thick, turbiditic, siliciclastic Ashin Formation (Upper Ladinian to Lower Carnian?) crops out widely in the Nakhlak area of central Iran. The rocks consist mainly of turbiditic volcaniclastic sandstones and shales that were deposited in distal parts of submarine fans of the continental slope to abyssal plain. Trace fossils occur commonly in the lower parts of the turbiditic volc...

Shallow marine deposits characterize the upper Albian – lower Cenomanian of Northern Algeria. In Djebel Azzeddine (Ouled Nail Mounts), corresponding sediments have been subdivided into three distinctive units A to C. The first discovered ammonite fauna from Bou Saada area allowed attribution a part mid-Cretaceous post-Continental Intercalaire Albian. ammonite-bearing level indicates maximum flo...

Nineteen ichnotaxa, together with algal and invertebrate remains, various pseudo-traces sedimentary structures are described from the Torneträsk Formation exposed near Lake Torneträsk, Lapland, Sweden, representing a marked increase in diversity of biotic traces recorded this unit. The “lower siltstone” interval contains mostly simple pascichnia, fodinichnia domichnia burrows trails low-energy ...

The Coniacian non-marine portion of the Frontier Formation in southwestern Montana has been primarily studied stratigraphically, whereas its trace fossil record and relative sedimentological significance have remained overlooked so far. We present first description a assemblage reported from deposits exposed western Centennial Mountains, Beaverhead County, Montana. Three main lithofacies groups...

A detailed ichnological analysis has been conducted, for the first time, of Arenazzolo and Trubi formations Caltanissetta Basin in Sicily. Aim this is to evaluate paleoenvironmental changes affecting macrobenthic tracemaker communities during re-flooding Mediterranean at end Messinian Salinity Crisis. The uppermost Formation characterized by a scarcity trace fossils, probably related high energ...

ABSTRACT The insect trace fossil Laetolichnus kwekai, which is composed of a small chamber extending to slender cylinders at each end, was tentatively included in the ichnofamily Krausichnidae as termite nests. New evidence presented here provides information validate these inferences. A more complex structure formed by interconnected recently found same Pliocene deposits (Laetoli, Tanzania) is...

Middle to Upper Triassic (Upper Ladinian to Lower Carnian) deep-sea sedimentary rocks crop out across a large area west of Nakhlak village, Central Iran and have been named Ashin Formation. The up to 304m thick, turbiditic, siliciclastic Ashin Formation consists of alternating turbiditic, thin- and medium-bedded calcareous sandstones, purple, fine-grained volcaniclastic sandstones, and mostly g...