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Inés Galindo, Markes E. Johnson, Esther Martín-González, Carmen Romero, Juana Vegas, Carlos S. Melo, Sérgio P. Ávila and Nieves Sánchez
This study examines the role of North Atlantic storms degrading a Late Pleistocene rocky shoreline formed by basaltic rocks overlying hyaloclastite rocks on a small volcanic peninsula connected to Gran Canaria in the central region of the Canary Archipel...
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Markes E. Johnson
Atmospheric carbon dioxide reached a record concentration of 419 parts per million in May 2021, 50% higher than preindustrial levels at 280 parts per million. The rise of CO2 as a heat-trapping gas is the principal barometer tracking global warming attri...
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Rigoberto Guardado-France, Markes E. Johnson, Jorge Ledesma-Vázquez, Miguel A. Santa Rosa-del Rio and Ángel R. Herrera-Gutiérrez
The 450-m long spit that extends westward from the northwest corner of Isla San Luis Gonzaga is one of the largest and most complex constructions of unconsolidated cobbles and boulders found anywhere in Mexico?s Gulf of California. The material source de...
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Sérgio P. Ávila, Markes E. Johnson, Ana Cristina Rebelo, Lara Baptista and Carlos S. Melo
Modern and palaeo-shores from Pleistocene Marine Isotope Substage 5e (MIS 5e) featuring prominent cobble/boulder deposits from three locations, on the southern and eastern coast of Santa Maria Island in the Azores Archipelago, were compared, in order to ...
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Dmitry A. Ruban
Coastal megaclast deposits are dominated by detrital particles larger than 1 m in size. These attract significant attention of modern researchers because of the needs of sedimentary rock nomenclature development and interpretation of storm and tsunami si...
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Markes E. Johnson, Erlend M. Johnson, Rigoberto Guardado-France and Jorge Ledesma-Vázquez
Previous studies on the role of hurricanes in Mexico?s Gulf of California examined coastal boulder deposits (CBDs) eroded from limestone and rhyolite sea cliffs. Sedimentary and volcanic in origin, these lithotypes are less extensively expressed as rocky...
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Markes E. Johnson, Ricardo Ramalho and Carlos Marques da Silva
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Zhiyi Tang, Chao Cao, Kunxian Tang, Hongshuai Qi, Yuanmin Sun and Jiangbo Yang
Carbon and nitrogen contents and their isotopic components, and AMS (Accelerator Mass Spectrometry) radiocarbon dating ages, were measured for 57 coastal sediments from Weizhou Island to analyze the distribution of total inorganic carbon (TIC) and its ca...
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Justin J. Birchler, Courtney K. Harris, Christopher R. Sherwood and Tara A. Kniskern
Geochronologies derived from sediment cores in coastal locations are often used to infer event bed characteristics such as deposit thicknesses and accumulation rates. Such studies commonly use naturally occurring, short-lived radioisotopes, such as Beryl...
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