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...

Cryogenian cap carbonates that overlie Sturtian glacial deposits were formed during a post-glacial transgression. Here, we describe microfossils from the Kakontwe Formation of Zambia and the Taishir Formation of Mongolia-both Cryogenian age, post-Sturtian cap carbonates-and investigate processes involved in their formation and preservation. We compare microfossils from these two localities to a...

Global energy sources such as coal and oil are limited, and the burning of such fossil resources creates pollution problems. Wind energy offers one of several promising clean alternatives to carbon-based fuels. However, the composite materials currently available for producing wind turbine blades cannot accommodate the scale-up of wind energy due to their high price and disposal challenges (e.g...

Fast-growing tree species are important due to their short growth time before they are harvested. Both the Poplar and Eucalyptus species are fast-growing trees. These two species have been cultivated in many parts of the world, and they are used in several ways, including in the pulp and paper industry, as wood-based panels, and as structural composite lumber. In this study, laminated veneer lu...

To enhance the local buckling resistance of thin-walled steel pipes and their fire corrosion resistance, a new spirally stiffened square concrete-filled tubular laminated composite member with transverse ribs is proposed. Through four forms combined members for eccentric pressure testing, it was found that: ordinary pipe concrete drum more severe; spiral ribs, limited between stiffening ribs; d...