UNUSUAL ICHNOFOSSILS IN HOMO ERECTUS-BEARING BEDS OF THE PLEISTOCENE LAKE DEPOSITS IN CENTRAL-EASTERN ERITREA, EAST AFRICA

Palaios ◽  
2012 ◽  
Vol 27 (2) ◽  
pp. 97-104 ◽  
Author(s):  
E. ABBATE ◽  
P. BRUNI ◽  
F. LANDUCCI ◽  
G. PELLICANO
2015 ◽  
Vol 386 ◽  
pp. 186-190 ◽  
Author(s):  
Mariusz Gałka ◽  
Laurent Bergonzini ◽  
David Williamson ◽  
Amos Majule ◽  
Catherine Masao ◽  
...  

Author(s):  
Stewart A. Weaver

When did exploration begin and who were the first explorers? ‘The peopling of the earth ’ shows that the deep origins of exploration are inseparable from the long process of the peopling of the earth that began between one and two million years ago, with the migration of Homo erectus out of the East Africa rift valleys. It considers the Polynesian seafaring people whose remarkable exploratory oceanic migration resulted in settlements and cultural exchange around and across the Pacific Ocean. The maritime exploration of the Norse reached Iceland, Greenland, and Newfoundland. The global circle of humanity closed, and the first of history's two big stories, that of human divergence, ended, and the second, that of human convergence, began.


2015 ◽  
Vol 370 (1663) ◽  
pp. 20140064 ◽  
Author(s):  
Mark A. Maslin ◽  
Susanne Shultz ◽  
Martin H. Trauth

Current evidence suggests that many of the major events in hominin evolution occurred in East Africa. Hence, over the past two decades, there has been intensive work undertaken to understand African palaeoclimate and tectonics in order to put together a coherent picture of how the environment of Africa has varied over the past 10 Myr. A new consensus is emerging that suggests the unusual geology and climate of East Africa created a complex, environmentally very variable setting. This new understanding of East African climate has led to the pulsed climate variability hypothesis that suggests the long-term drying trend in East Africa was punctuated by episodes of short alternating periods of extreme humidity and aridity which may have driven hominin speciation, encephalization and dispersals out of Africa. This hypothesis is unique as it provides a conceptual framework within which other evolutionary theories can be examined: first, at macro-scale comparing phylogenetic gradualism and punctuated equilibrium ; second, at a more focused level of human evolution comparing allopatric speciation , aridity hypothesis , turnover pulse hypothesis , variability selection hypothesis , Red Queen hypothesis and sympatric speciation based on sexual selection. It is proposed that each one of these mechanisms may have been acting on hominins during these short periods of climate variability, which then produce a range of different traits that led to the emergence of new species. In the case of Homo erectus ( sensu lato ), it is not just brain size that changes but life history (shortened inter-birth intervals, delayed development), body size and dimorphism, shoulder morphology to allow thrown projectiles, adaptation to long-distance running, ecological flexibility and social behaviour. The future of evolutionary research should be to create evidence-based meta-narratives, which encompass multiple mechanisms that select for different traits leading ultimately to speciation.


2019 ◽  
pp. 40-68
Author(s):  
Lea Rausch ◽  
Marius Stoica

The early Pleistocene travertines from the Denizli Basin in SW Anatolia, from which the only known Homo erectus finding from Turkey was recovered, are unconformably overlain by a 20 m thick succession of alkaline lake deposits that bear a rich ostracod fauna. The ostracod assemblage consists of a mixture of freshwater and mesohaline tolerant taxa. The following sixteen species have been identified: Candona neglecta, C. ex. gr. candida, Cypria sp., Darwinulina stevensovi, Lineocypris sp., Prinocypris zenkeri, Cyrpideis torosa, C. sp., Tyrrhencythere pontica, T. ex. gr. bailovi, T. sp. 1, T. sp. 2, Amnicythere pediformis, A. mutlituberculata, Loxoconchissa (Loxocaspia) aff. reticulata, L. (L.) aff. reticulata var. rugosa. The conditions inside the lake were interpreted from the encountered assemblage, suggesting a restricted anomalohaline shallow water environment with a salinity no greater than lower mesohaline. The age of the studied succession was previously constrained by cosmogenic nuclide concentration, palaeomagnetic measurements and large mammal biostratigraphy which suggest deposition occurred between ~ 1.6 and 1.1 Ma.


The oldest known probable manuport is the dark reddish jasperite pebble from a layer with Australopithecus at Makapansgat, Transvaal ( ca . 3 Ma). There are indications at two earliest Acheulian sites in east Africa that Homo erectus ol ca . 1.5 Ma B . P .was interested in red mineral pigment. At Terra Amata,near Nice, 75 shaped pieces of red ochre were found with the earliest European Acheulian industry ( ca . 0.3 Ma B . P .). This occurrence indicates that to an Acheulian society red mineral pigment had great symbolic value. Several flint and chert artefacts from Acheulian sites in Britain are described on account of embedded fossils, evidently regarded as symbolic, with a visual pattern stimulating to an aesthetic impulse in the minds of men who selected the material in preference to the more readily available plain flint. Most remarkable are two humanly struck flakes of coral-bearing chert found in the Swanscombe Gravels (0.2Ma B . P. This starry stone, it is inferred, was a manuport carried about 120 miles ( ca . 193 km) from an outcrop of Jurassic (Portlandian) rock at Tisbury in Wiltshire.


2018 ◽  
Vol 24 (2) ◽  
Author(s):  
VIMLESH KUMAR TIWARI

Performance of developed genotype RMT 08-2 was evaluated in central, eastern and north-eastern states of India under rain-fed condition for quantitative and qualitative traits. It gave highest seed yield over checks in zone III and V. Morphologically plants were erect, medium spreading in nature and primary branches with dichotomous habit. Plants height ranged from 107124 (cm) which matured in 82-112 days. Mature seeds were round in shape and blackish brown in colour. No significant difference between RVT-2 and checks were observed for test weight trait. An average oil yield 485 (kg/h) was recorded over 7 places which was 10% higher than both checks i.e. 14.12% and 11.24% under AICRP trials. Maximum seed yield was obtained on farmers field during 2013-14 and 2014-15 which was 1500 (kg/h) and 1215 (kg/h) that is 33.42% and 26.30% respectively over farmers own seeds. At Morena center, highest seed yield (1753 kg/h) over Bhawani (1512 kg/h) was 15.94% higher than check whereas RVT-2 gave 2245 (kg/h) against Bhawani (1975 kg/h) which was 13.67% higher. DNA finger printing indicated that primers PUT-19, PUT-96, PUT-149, PUT-169, PUT-181 and PUT-271 are useful in generating unique profile of RVT-2 containing 27 bands for its discrimination from other varieties.


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