The smoking gun revealing the secrets of the end-Permian mass mortality is a unique 1-2-m-thick layer consisting of 5–20-cm-long crystals of calcite that occurs precisely at the Permian–Triassic boundary (PTB) in Iran, Armenia, Turkey, and China. This layer is interpreted as synsedimenta...
In recent years, the lagoon has totally dried out, offering for the first time the opportunity to analyze its desiccation process as a "time-analog" to similar events occurred in paleolakes with varying salinity during the wet-to-dry transition on early Mars. On the martian cratered highlands...
(2003) Deev Jahi model of the Permian-Triassic boundary mass extinction: a case for gas hydrates as the main cause of biological crisis on Earth. Sedimentary Geology, 163, 147A163.Heydari E., Hassanzadeh J., 2003. Deev Jahi model of the Permian- Triassic boundary mass extinction: a ...
Many large paleo-lakes in North China were formed after the Triassic Era. Seawater incursion events (SWIEs) in these lakes have been extensively discussed in the literature, yet lack reliable methodology and solid evidence, which are essential for reconstructing and confirming SWIEs. The present ...
In fact, although Laurasia and Gondwana were classically understood in the context of a dual world, interchanges between Africa and Laurasia were not occasional or minor events from the early Cretaceous (Gheerbrant and Rage, 2006). The reasons for such patterns could be related to the ancient...
[32]. It corresponds to an age at approximately 296 ka B.P. The core of 0–4.30 m records the evolutionary history of the ancient marine environment since the mid-Pleistocene and can be divided into MIS 1–8. The core was affected by abrupt tectonic–climatic events, the most notable ...
Their bony shells are durable structures—in life and in death. The history of turtles extends back at least 220-210 Ma to the Late Triassic, in which the most primitive turtle with a complete shell, Proganochelys, occurred (Fig. 3.23). Some pectoral girdle elements and dermal bones fused...
The invasion events of A. euteiches in pea roots have been described by Papavizas and Ayers (1974). The germ tube invades the host tissue in the intercellular spaces within 2 h. In some cases, it enters the cell wall with the formation of an appressorium-like structure. Within a few...
8,14 The lungs are well developed, and the vessel walls are thicker than in mammals to compensate for extra pressure during diving events. The primary respiratory muscle groups are the intercostal muscles and two transverse membranes, the postpulmonary membrane and the posthepatic membrane, both ...
Table 1. The geological time-scale, in millions of years ago (mya) EraPeriodEpoch Paleozoic 540-245 mya Cambrian (540-505 mya) to Permian (286-245 mya) — Mesozoic 245-66 mya ‘Age of Reptiles’ Triassic (245-210 mya) — Jurassic (210-144 mya) Cretaceous (144-66 mya) Cenozoic ...