KSIĄŻKI POWIĄZANE ZE SŁOWEM «SPHERULE»
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1
The Late Eocene Earth: Hothouse, Icehouse, and Impacts
Based on Ir data from the five sites in this study, plus data from seven additional
sites, we estimate that the geometric mean of the Ir fluence for the cpx spherule
layer is ~5.7 ng/cm2. Assuming similar projectile characteristics and velocity, we
...
Christian Koeberl, Alessandro Montanari, 2009
2
Distal Impact Ejecta Layers: A Record of Large Impacts in ...
Secondly, ejecta may not have been dispersed equally in all directions, as
suggested by thickness variations in the Carawine spherule layer within the
Oakover River area (see Sect. 8.2.5.4). Finally, reworked spherule layers can
vary in ...
Billy P. Glass, Bruce M. Simonson, 2012
3
Catastrophic Events and Mass Extinctions: Impacts and Beyond
Nature of spherule layer 1. Thin sections of the spherule layers indicate that the
oldest spherule layer 1 (shown in Fig. 5, A and B) consists almost entirely of
closely packed devitri- fied vesicular spherules and altered glass fragments up to
5 ...
Christian Koeberl, Kenneth G. MacLeod, 2002
4
The Sedimentary Record of Meteorite Impacts
Composite El Peñon litholog showing the classic sandstone deposit with two
reworked spherule layers at the base, and 150 m away, the newly discovered
original Chicxulub impact spherule deposit near the base of zone CF1 about 4 m
...
5
Processes on the Early Earth
DESCRIPTION OF SAMPLES OF SPHERULE LAYERS AND VOLCANOGENIC
STRATA Sample Stratigraphy, rock type Grain size, packing Constituents
Spherule layers H9 S1 spherule layer (Fig. 3), spherule-bearing sandstone (
upper layer) ...
W. U. Reimold, Roger Lawrence Gibson, 2006
6
The Precambrian Earth: Tempos and Events
cerning Precambrian spherule layers from most of the Earth's surface. Therefore,
extreme caution is advisable in estimating the total mass of spherules from a
given impact in the face of such extreme variations in thickness. The lateral extent
of ...
P.G. Eriksson, Wladyslaw Altermann, D.R. Nelson, 2004
7
Large Meteorite Impacts III
The Siberian native iron occurrences retain no clear meteorite signature, but
have been interpreted as impact- related breccias by Treiman et al. (2002).
NUUSSUAQ SPHERULE BEDS The spherule beds in sediments immediately
underlying ...
Thomas Kenkmann, Friedrich Hörz, Alexander Deutsch, 2005
8
The Asteroid Impact Connection of Planetary Evolution: With ...
Estimates of crater location based on the time relations between spherule settling
and tsunami arrival involve a number of assumptions, including the point origin of
the tsunami and velocity of airborne spherules. Submarine impact-induced ...
9
U.S. Geological Survey professional paper
The composition of three magnetic spherules was determined by X-ray diffraction
techniques. Each spherule was mounted at the end of a thin glass fiber and
placed in a powder camera (114.59 mm diameter) so that only the spherule was
in ...
Geological Survey (U.S.), 1902
10
Integrated Earth and Environmental Evolution of the ...
Photomicrograph of carbonate spherules from the reworked spherule clast in the
Alamo Breccia. The central spherule shows a coarsely crystalline nucleus
surrounded by a core of grains that fine outward and culminate in very fine
grained ...
Clarence A. Hall, Wallace Gary Ernst, Clemens Arvid Nelson, 1998
WIADOMOŚCI, KTÓRE ZAWIERAJĄ SŁOWO «SPHERULE»
Sprawdź, o czym dyskutuje się w prasie krajowej i zagranicznej oraz jak jest stosowane słowo
spherule w wiadomościach.
In Our View: Beware of Valley Fever
Once in the lung, the spore changes into a larger, multicellular structure called a spherule. The spherule grows and bursts, releasing endospores, which develop ... «St. George Daily Spectrum, Lip 15»
Weatherwatch: Glass globes blown by lightning
Five years later, researchers led by Kimberly Genareau, of the University of Alabama. have written, that, among the volcanic debris, were glass spherules (small ... «The Guardian, Kwi 15»
Meteorite material born in molten spray as embryo planets collided
"Chondrules are identical in size, shape and texture to spherules on Earth and spherules found in the lunar soil," Melosh said. "The only difference among ... «Purdue Newsroom, Sty 15»
Research Looks For Genetic Link To Valley Fever
A spherule develops in the lung after the Valley Fever fungus is inhaled. Rachel Ewer died after an eight year struggle with Valley Fever in 2011. “She played ... «KJZZ, Paz 14»
Golfing on Mars? Curiosity Rover Can Provide a Hole (and the Balls)
The spherules were formed billions of years ago when mineral-rich water seeped ... The lone spherule sitting on the rock is about a half-inch (a centimeter wide) ... «NBCNews.com, Wrz 14»
Nanodiamonds Are Forever
A three-dimensional carbon spherule containing n-diamonds and lonsdaleite-like crystals from Daisy Cave on San Miguel Island, one of California's Channel ... «The UCSB Current, Sie 14»
Valley fever research moves forward at UC Merced
Researcher Katrina Hoyer looks at a picture of a spherule with endospores that has erupted and released the endospores into a lung and spread infection, in a ... «Merced Sun-Star, Sie 14»
Scientists Challenge the “Chicxulub Crater” Theory
Right underneath the iridium was a layer of 'spherules', tiny balls of rock which seemed to have been condensed from rock which had been vapourised by a ... «The Yucatan Times, Cze 14»
Few, if any, big impact craters remain to be discovered on Earth …
A thin layer of these particles, called spherules, then blankets the Earth. This layer of spherules persists in the geologic record and can be used to determine the ... «Phys.Org, Cze 14»
Scientists solve puzzle of a massive asteroid that hit South Africa
Sphere-shaped particles, called spherules and resembling pellets from a BB gun, were found in the layers of rock. The beds of spherules are rich in iridium and ... «Medill Reports: Chicago, Kwi 14»
