Results 71 to 80 of about 301,733 (364)

Distance sampling: comparing walked transects and road transects for rock ptarmigan densities and population trends

open access: yesWildlife Biology, EarlyView.
We compared population trends for rock ptarmigan Lagopus muta densities (2003‒2019) derived from walked transects and driven road transects in Mosfellsheiði and Slétta in southwest and northeast Iceland, respectively. The walked transects were laid out according to a random rule.
Matteo Ferrarini, Ólafur K. Nielsen
wiley   +1 more source

Impact vesiculation – a new trigger for volcanic bubble growth and degassing [PDF]

open access: yes, 2007
We highlight a potentially important trigger for bubble growth and degassing in volcanic bombs. We have successfully triggered bubble growth in previously unvesiculated samples of silicate melt during experiments to simulate volcanic bomb impact, by ...
Dingwell, D. B.   +3 more
core   +1 more source

Handheld photogrammetry advances capabilities to systematically characterize broken‐rock habitat

open access: yesWildlife Society Bulletin, EarlyView.
We developed a novel workflow using handheld photogrammetry to map and quantify fine‐scale habitat characteristics in broken‐rock patches, enabling detailed assessment of structurally complex habitats. Using structure‐from‐motion and image segmentation techniques, we generated high‐resolution digital elevation models and orthomosaics to classify cover ...
Ana T. Ferreira   +4 more
wiley   +1 more source

The origin of tubular lava stalactites and other related forms [PDF]

open access: yesInternational Journal of Speleology, 1998
Tubular lava stalactites are often found in lava tubes. Field observations, sample analysis, and comparative studies indicate that these are segregations extruded during cooling from partially crystallized lava al about 1,070 - 1,000 °C.
Kevin Allred, Carlene Allred
doaj  

ANALISIS SEBARAN LAVA BANTAL WATUADEG YANG DIDUKUNG DATA VERTICAL ELECTRICAL SOUNDING (VES) DI LAPANGAN ‘AGSTY’ YOGYAKARTA

open access: yesJambura Physics Journal, 2020
Analisis sebaran lava bantal Watuadeg di Kecamatan Berbah DI Yogyakarta yang didukung data Vertical Electrical Sounding (VES )telah dilakukan.Keterdapatan lava bantal yang tersingkap di permukaan merupakan penanda bahwa dahulu daerah tersebut merupakan ...
Nurul Dzakiya   +3 more
doaj   +1 more source

The Syntactic Status of Subject Clitics: A Problem from Venetan SE‐Constructions

open access: yesTransactions of the Philological Society, EarlyView.
Abstract This article reopens the discussion on the syntax of subject clitics (SCLs) in Venetan dialects by providing a problematic piece of data and outlining its theoretical consequences. New evidence from se‐constructions in Alto Polesine Venetan (APV) shows that SCLs resist a unitary categorisation even within the same dialect group: in varieties ...
Marco Fioratti, Leonardo Russo Cardona
wiley   +1 more source

Emplacement of the Rocche Rosse rhyolite lava flow (Lipari, Aeolian Islands) [PDF]

open access: yes, 2018
The authors acknowledge Airbus Defence and Space for providing satellite imagery, financial support from Keele University and fieldwork grants from the Mineralogical Society of Great Britain and Ireland and the Volcanic and Magmatic Studies Group.
Bullock, Liam A   +2 more
core   +2 more sources

What can lithics tell us about hominin technology's ‘primordial soup’? An origin of stone knapping via the emulation of Mother Nature

open access: yesArchaeometry, EarlyView.
Abstract The use of stone hammers to produce sharp stone flakes—knapping—is thought to represent a significant stage in hominin technological evolution because it facilitated the exploitation of novel resources, including meat obtained from medium‐to‐large‐sized vertebrates. The invention of knapping may have occurred via an additive (i.e., cumulative)
Metin I. Eren   +23 more
wiley   +1 more source

The 2017 Nishinoshima eruption: combined analysis using Himawari-8 and multiple high-resolution satellite images

open access: yesEarth, Planets and Space, 2019
Nishinoshima volcano suddenly resumed eruptive activity in April 2017 after about 1.5 years of dormancy since its previous activity in 2013–2015. Nishinoshima is an uninhabited isolated island.
Takayuki Kaneko   +4 more
doaj   +1 more source

Northwest Africa 5790. Top Sequence of the Nakhlite Pile [PDF]

open access: yes, 2010
NWA 5790 is a recently discovered nakhlite. Its mineralogy, petrology and geochemistry suggest that it is the topmost sequence of the nakhlite lava ...
Badia, D.   +7 more
core  

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