نتایج جستجو برای: lapilli

تعداد نتایج: 116  

2015
Chengzhi Ding Yifeng Chen Dekui He Juan Tao

Daily increment validation in fish otolith is fundamental to studies on fish otolith microstructure, age determination and life history traits, and thus is critical for species conservation and fishery management. However, it has never been done for Schizothoracine fish, which is the dominant component of fish fauna in the Tibetan Plateau. This study validated the daily increment formation of G...

2016
Nathan G. Smith Cynthia M. Jones

Chemical analysis of fish otoliths has become an important technique in fisheries science with widespread applications. Most research up to this point has focused predominantly on sagittal otoliths, but the underlying assumptions may also apply to lapilli. The goal of this study was to determine whether lapilli and sagittae have the same otolith chemistry and whether one can be substituted for ...

2007
Lionel Wilson

Explosive volcanic eruptions, potentially involving large amounts of magmatic and entrained water, are thought to have been very important in the Noachian and Hesperian periods earlier in Mars history, and basaltic plinian eruptions are likely to have occurred throughout martian history. Previous treatments of explosive volcanic plumes on Mars have simply extrapolated plume models for the Earth...

Journal: :Geosciences 2022

We present initial rock magnetic results for both lava flows and lapilli produced by the 2021 eruption of Cumbre Vieja, La Palma (Canary Islands). Samples were taken during to minimize early alteration weathering rocks tephra. Standard procedures included progressive alternating field thermal demagnetization, hysteresis curves, thermomagnetic experiments, acquisition isothermal remanent magneti...

Journal: :The Journal of the Geological Society of Japan 1986

Journal: :Journal of the Sedimentological Society of Japan 2001

2017
Nicholas Deardorff Katharine Cashman

Microcrystalline inclusions within microlite-poor matrix are surprisingly common in low intensity eruptions around the world, yet their origin is poorly understood. Inclusions are commonly interpreted as evidence of crystallization along conduit margins. Alternatively, these clasts may be recycled from low level eruptions where they recrystallize by heating within the vent. We conducted a serie...

Journal: :JOURNAL OF MINERALOGY, PETROLOGY AND ECONOMIC GEOLOGY 1989

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