Results 121 to 130 of about 14,904 (246)

Cyclic volcanism at convergent margins: linked to aarth orbital parameters or climate changes? [PDF]

, 2010
EGU2010-13373 The frequency of volcanic activity varies on a wide rangeof spatial and temporal scales, from
Freundt, Armin, Jegen-Kulcsar, Marion, Kutterolf, Steffen, Kwasnitschka, Tom   +3 more
core  

Fast or slow: An evaluation of Ti-in-quartz diffusion coefficients through comparisons of quartz and plagioclase diffusion times

Volcanica
Diffusion geochronometry using Ti-in-quartz has become a valuable method in understanding the evolution of silicic magmas. However, four different options for Ti diffusivity (DTi) currently exist, spanning three orders of magnitude, resulting in ...
Sophia Y. Wang, Guilherme A. R. Gualda, Jordan Lubbers, Adam J. R. Kent   +3 more
doaj   +1 more source

Caldera collapse thresholds correlate with magma chamber dimensions. [PDF]

Sci Rep, 2023
Geshi N, Miyagi I, Saito G, Conway CE.
europepmc   +1 more source

Field trip guide to Oligocene Limestones and Caves in the Waitomo District [PDF]

, 2013
The field guide runs from Hamilton to Waitomo to Te Anga and return in limestone-dominated country developed in transgressive sedimentary deposits of the Oligocene Te Kuiti Group – a world class example of a temperate shelf carbonate depositional system.
Hendy, Chris H., Nelson, Campbell S.
core   +1 more source

Is Efate (Vanuatu, SW Pacific) a result of subaerial or submarine eruption? An alternative model for the 1 Ma Efate Pumice Formation

Open Geosciences, 2010
Stewart Robert, Németh Karoly, Cronin Shane   +2 more
doaj   +1 more source

Application of Integrated Geophysical Techniques to Map Groundwater Potential Zones and Geological Structures for Irrigation Purpose at “Humbo-Larena” Plain, Wolaita Zone, Ethiopia

International Journal of Geophysics
Groundwater resource in the “Larena Plain” at the western margins of the Southern Main Ethiopian Rift (SMER) was investigated using integrated geophysical techniques—electrical resistivity and magnetic methods.
Ayalew Lemma Teklemariam
doaj   +1 more source

Ignimbrites Related to Neogene Volcanism in the Southeast of the Iberian Peninsula: An Experimental Study to Establish Their Pozzolanic Character. [PDF]

Materials (Basel), 2023
Martín DA, Costafreda JL, Presa L, Crespo E, Parra JL, Astudillo B, Sanjuán MÁ.   +6 more
europepmc   +1 more source

Age of the Rotoehu Ash. Comment. [PDF]

, 1995
Suggests that the article by Whitehead & Ditchburn (1994), although presenting useful new data on 230Th/232Th analyses, is flawed and misleading in suggesting that the Rotoiti Tephra is considerably younger than c.
Hogg, Alan G., Lowe, David J.
core   +1 more source

Continuity and change in lithic techno-economy of the early Acheulian on the Ethiopian highland: A case study from locality MW2; the Melka Wakena site-complex. [PDF]

PLoS One, 2022
Gossa T, Hovers E.
europepmc   +1 more source

Mountain building processes in the Central Andes [PDF]

False color composite images of the Thematic Mapper (TM) bands 5, 4, and 2 were examined to make visual interpretations of geological features. The use of the roam mode of image display with the International Imaging Systems (IIS) System 600 image ...
Bloom, A. L., Isacks, B. L.
core   +1 more source