نتایج جستجو برای: boulders

تعداد نتایج: 736  

Journal: :Resources 2023

The article presents a new geosite in small provincial town central Poland. It contains twelve Scandinavian erratic boulders from the area, deposited by Pleistocene ice sheet about 130,000 years ago. geotrail is equipped with three informative boards, folder, and each boulder has its own identifier. also draws attention to petrographic types of among collected boulders. Their basic dimensions, ...

Journal: :The planetary science journal 2021

Abstract We use the known surface boulder-size distribution of C-type rubble pile asteroid Ryugu (NEA 162173) to determine its macroporosity, assuming it is a homogeneous granular aggregate. show that volume-frequency boulders, cobbles, and pebbles, well-represented by lognormal function with σ = 2.4 ± 0.1 μ 0.2 0.05. Application linear-mixture packing theory yields value for macroporosity ϕ 0....

Journal: :Remote Sensing 2022

The detachment and mobilization of boulders from rocky shore platforms by waves involves complex geomorphic hydrodynamic processes. Understanding these processes requires precise information on the rates patterns movement megaclasts scaled against wave conditions that generate boulder mobility. Repeat photogrammetry structure-from-motion (SfM) models commonly used in analyses are an interesting...

Journal: :Canadian Journal of Earth Sciences 2022

Tidal flats are widely distributed on high-latitude coasts, where sea ice processes have been invoked to explain the abundance and distribution of boulders. This study documents surface morphology sediment dynamics a Low-Arctic macrotidal system, boulder-rich tidal Koojesse Inlet, fronting Nunavut capital, Iqaluit, Baffin Island. is region postglacial isostatic uplift forced regression, with ra...

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