Results 91 to 100 of about 14,980 (261)
The last common bilaterian ancestor [PDF]
, 2002 Many regulatory genes appear to be utilized in at least superficially similar ways in the development of particular body parts in Drosophila and in chordates.
Davidson, Eric H., Erwin, Douglas H.
core
Tubular Compression Fossils from the Ediacaran Nama Group, Namibia [PDF]
, 2010 Abundant tubular macrofossils occur in finely laminated siltstones and shales of the 548-542 Ma Schwarzrand Subgroup. Nama Group, Namibia. The Nama tubes occur in both the Vingerbreek and Feldschuhhorn members commonly in dense populations and always in ...
Abelson, John +13 more
core +1 more source
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, Volume 73, Issue 3, Page 802-837, April 2026.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
Cryogenian Glacial Erosion and Tectonics as Agents of Crustal Recycling
Terra Nova, Volume 38, Issue 2, Page 87-96, April 2026.ABSTRACT Zircon preserves evidence of recycling processes that link surface environments to the mantle. Combined δ18O‐εHf in zircon fingerprints magmatic sources and tracks how crustal material is reworked over time. We apply statistical analyses to a global compilation that apparently resolves shifts in zircon U–Pb, δ18O, and Lu‐Hf data spanning the ...
M. Seraine +9 more
wiley +1 more source
Guide to the geology of Bradgate Park and Swithland Wood, Charnwood Forest [PDF]
, 2010 Charnwood Forest is one of the few parts of England where there are exposures of ‘basement’ rocks dating back to Precambrian time. Its locally rugged topography is caused by these highly resistant rocks protruding as craggy knolls through a surrounding ...
Carney, J.N.
core
Terra Nova, Volume 38, Issue 2, Page 97-105, April 2026.ABSTRACT The Transbrasiliano‐Kandi‐4°50′ (TK4) shear zone in western Gondwana crosscuts South America and NW Africa for at least 6000 km. Despite its impressive size, the timing of the main episode of dextral ductile shearing is uncertain. We present detailed in situ multi‐mineral geochronology of mylonites from both Brazil and Algeria supporting that ...
F. A. Caxito +4 more
wiley +1 more source
Power, competition, and the nature of history [PDF]
, 2019 Historians have debated whether pathways and events from the past to the present are influenced largely by contingency, the dependence of outcomes on particular prior conditions, or whether there is long-term emergent directional change.
Vermeij, Geerat J
core +1 more source
Subsidence history of the Ediacaran Johnnie Formation and related strata of southwest Laurentia: Implications for the age and duration of the Shuram isotopic excursion and animal evolution [PDF]
, 2018 The Johnnie Formation and associated Ediacaran strata in southwest Laurentia are ~3000 m thick, with a Marinoan cap carbonate sequence at the bottom, and a transition from Ediacaran to Cambrian fauna at the top.
Wernicke, Brian P., Witkosky, Rebecca
core +1 more source
The Geology as an indispensable tool for optimizing the exploration of dimension Stones [PDF]
, 2012 Like any Geological Resource, the Dimension Stones can only be exploited where they occur. How they occur is a reflection of geological history that presided over its formation.
Lopes, Luís
core
Journal of the Palaeontological Society of IndiaThe Sonia Sandstone of the Jodhpur Group, Marwar Supergroup in western Rajasthan, has unveiled many fossil assemblages, significantly advancing our comprehension of the Ediacaran biotic diversity and palaeoecological dynamics.
S. AHMAD, S. K. PANDEY
doaj +1 more source