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Evidence from detrital zircons for the existence of continental crust and oceans on the Earth 4.4 Gyr ago
TLDR
The discovery of a detrital zircon with an age as old as 4,404 ± 8 Myr is reported, about 130 million years older than any previously identified on Earth and represents the earliest evidence for continental crust and oceans on the Earth.
4.4 billion years of crustal maturation: oxygen isotope ratios of magmatic zircon
Analysis of δ18O in igneous zircons of known age traces the evolution of intracrustal recycling and crust-mantle interaction through time. This record is especially sensitive because oxygen isotope
Further Characterisation of the 91500 Zircon Crystal
This paper reports the results from a second characterisation of the 91500 zircon, including data from electron probe microanalysis, laser ablation inductively coupled plasma‐mass spectrometry
A cool early Earth
No known rocks have survived from the first 500 m.y. of Earth history, but studies of single zircons suggest that some continental crust formed as early as 4.4 Ga, 160 m.y. after accretion of the
Comment on "Heterogeneous Hadean Hafnium: Evidence of Continental Crust at 4.4 to 4.5 Ga"
TLDR
The large uncertainties of this claim that plate tectonics and granites existed 4.5 billion years ago are highlighted and the more moderate proposal that some crust formed by 4.4 Ga and oceans formed by4.2 Ga is made.
Calcite‐Graphite Thermometry of the Franklin Marble, New Jersey Highlands
We present new stable‐isotope data for the Mesoproterozoic Franklin Marble from outcrops along an 80‐km traverse parallel to and across strike of the structural grain of the western New Jersey
Shawinigan arc magmatism in the Adirondack Lowlands as a consequence of closure of the Trans-Adirondack backarc basin
The Antwerp-Rossie metaigneous suite (ARS) represents arc magmatism related to closure of the Trans-Adirondack backarc basin during Shawinigan collisional orogenesis (ca. 1200–1160 Ma). The ARS is of
Autopsy of an Egyptian mummy
TLDR
The mummy studied by multidisciplinary approach, was Pum II, belonging to the Philadelphia Art Museum, and was in good condition; the extensive wrapping is described, and parasites and insects found are noted.
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