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American Journal of Science

Founded in 1818 by Benjamin Silliman. The Journal is devoted to geology and related sciences. www.ajsonline.org
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https://ajs.manuscriptmanager.net/ The American Journal of Science (AJS), founded in 1818 by Benjamin Silliman, is the oldest scientific journal in the United States that has been published continuously. The Journal is devoted to geology and related sciences and publishes articles from around the world presenting results of major research from all earth sciences. Readers are primarily earth scient

ists in academia and government institutions. The American Journal of Science considers contributions from any field within the Earth Sciences, however the papers are expected to be of interest to a broad cross section of the scientific community. Consequently, manuscripts more appropriate for regional or specialty journals are often returned to authors without external review. AJS would like to increase its visibility in the broad field of Earth System History that would address the following three broad areas:
1. The coupling of the solid earth, ocean and atmospheric systems through time
2. The relationships and feedbacks between tectonics and climate
3. Deep time coupling of biology to the chemical evolution of Earth
AJS strives to publish papers with maximum impact in their fields. There are no limits on the minimum or maximum sizes of submitted manuscripts.

12/02/2024

New Paper: Deformation by Pressure Solution and Grain Boundary Sliding in a Retrograde Shear Zone in Southern New England, USA by Robert P. Wintsch, Bryan A. Wathen, Ryan J. McAleer, Jesse Walters, & Jessica A. Matthews
Am J Sci 2024; 324:17 https://doi.org/10.2475/001c.125064
https://ajsonline.org/article/125064
"Micaceous schist near Ansonia, Connecticut developed in a ductile fault by dissolution of original minerals and precipitation of new platy micas that produced a very fissile rock."

11/04/2024

New Paper: Calcite dissolution-reprecipitation reactions are a key control on the Sr/Ca, Mg/Ca and δ88/86Sr compositions of Himalayan river waters by Emily I. Stevenson, Kevin W. Burton, Ian J. Parkinson, Rachael H. James, Basak Kisakürek, Ed Tipper, and Michael Bickle
Am J Sci 2024; 324:16 https://doi.org/10.2475/001c.124202
https://ajsonline.org/article/124202
"The increase in Sr/Ca ratios of Himalayan rivers is modelled by balanced dissolution-precipitation reactions. The stable Sr-isotopic compositions and Sr/Ca ratios of waters constrain the carbonate reprecipitation rates."

10/10/2024

New Paper: Organic-rich Shales Reveal Local Controls That Enhanced Mercury Accumulation During a non-LIP Interval of the Miocene: Implications for the Mercury Paleoproxy by Theodore R. Them II, Clara L. Meier, Christopher J. Tino, Marisa D. Knight, Leanne G. Hancock, Richard J. Behl, and Timothy W. Lyons
Am J Sci 2024; 324:15 https://doi.org/10.2475/001c.122687
https://ajsonline.org/article/122687
"Sedimentary mercury concentrations from an outcrop and two drill cores of the Miocene Monterey Formation reveal different mechanisms for mercury accumulation, revealing processes beyond volcanism can cause sedimentary mercury enrichments."

10/01/2024

New Paper: Zircon U-Pb Age and Hf-O Isotope Evidence of the Taihua Complex on the Southern Margin of the North China Craton: Implications for Its Magmatic Process During the Early Paleoproterozoic by Nancy Hui-Chun Chen, Yunpeng D**g, and Bo Hui
Am J Sci 2024; 324:14 https://doi.org/10.2475/001c.123684
https://ajsonline.org/article/123684
"At ca. 2.2 Ga, the Taihua Complex within the Xiaoqinling area underwent low-temperature hydrothermal reactions during the magmatic crystallization, which might have affected by the Huronian Glaciation Event?"

09/24/2024

New Paper: Sedimentary Greigite Formation by David Rickard, Andrew P. Roberts and Alexandra Navrotsky
Am J Sci 2024; 324:13 https://doi.org/10.2475/001c.121855
https://ajsonline.org/article/121855
"Greigite is a stable Fe-S phase, an alternative end-point to pyrite in iron sulfide transformation, crucial for understanding ancient Earth surface conditions."

09/11/2024

New Paper: Geology of the Eastern Barberton Greenstone Belt, South Africa: Early Deformation and the Role of Large Meteor Impacts by Donald R. Lowe and Gary R. Byerly
Am J Sci 2024; 324:12 https://doi.org/10.2475/001c.122938
https://ajsonline.org/article/122938
"Sandstone and other detrital sedimentary units provide key information on the nature of the earliest known tectonism and crust on the Earth 3.25 billion years ago."

06/20/2024

New Paper: Controls on the Termination of Cretaceous Oceanic Anoxic Event 2 in the Tarfaya Basin, Morocco by Chiara Krewer, Simon W. Poulton, Robert J. Newton, Christian März, Benjamin J. W. Mills, and Thomas Wagner
Am J Sci 2024; 324:11 https://doi.org/10.2475/001c.118797
https://ajsonline.org/article/118797
"The recovery from OAE2 in the Tarfaya Basin was driven by decreasing chemical weathering, less intensely reducing conditions and pulses of phosphorous drawdown."

06/12/2024

New Paper: The Rare Earth Element Distribution in Marine Carbonates as a Potential Proxy for Seawater pH on Early Earth by Ping-Chun Lin and David C. Catling
Am J Sci 2024; 324:10 https://doi.org/10.2475/001c.118215
https://ajsonline.org/article/118215
"To better understand early Earth's environment, we use rare earth element distributions in marine carbonates to infer Precambrian seawater pH, where pH trends compare favorably with boron isotope pH estimates."

05/24/2024

New Paper: Late Cretaceous Uplift of Grand Canyon: Evidence From Fluid Inclusions by Laura L. Barnett, Peter Copeland, Virginia B. Sisson, and Steve Naruk
Am J Sci 2024; 324:9 https://doi.org/10.2475/001c.116737
https://ajsonline.org/article/116737
"Fluid inclusion entrapment temperatures and burial histories from Grand Canyon suggest major denudation of late Cretaceous strata occurred from 89-58 Ma, consistent with early stages of Grand Canyon Formation."

04/26/2024

New Paper: The Carbon Isotopic Composition of Archean Kerogen and Its Resilience Through the Rock Cycle by Sarah S. Zeichner, Woodward W. Fischer, Noam Lotem, Kelsey R. Moore, Joshua E. Goldford, and John M. Eiler
Am J Sci 2024; 324:8 https://doi.org/10.2475/001c.116058
https://ajsonline.org/article/116058

04/22/2024

New Paper: Thermal Expansion of Metal Oxides in Silicate Melts: A Simple Theoretical Analysis by H. Wayne Nesbitt, Pascal Richet, Grant S. Henderson, and G. Michael Bancroft
Am J Sci 2024; 324:7 https://doi.org/10.2475/001c.115477
https://ajsonline.org/article/115477

04/15/2024

New Paper: Abundant 2480 Ma Detrital Zircons in ∼1740 Ma Vishnu Schist in Northwestern Arizona: Derivation From the Matachewan Large Igneous Province? by Jon E. Spencer, Michael F. Doe, Kenneth J. Domanik
Am J Sci 2024; 324:6 https://doi.org/10.2475/001c.115633
https://ajsonline.org/article/115633

04/05/2024

New Paper: Cenozoic Basin Evolution During Alternating Extension and Shortening in the Southern Central Andes Along the Chile-Argentina Border, 37–38°S by Alfonso Encinas, Eduardo Rosselot, Lucía Sagripanti, Andrés Folguera, Brian K. Horton, Darío Orts, Victor A. Valencia, Gabriel Arriagada, Paz Butikofer, and Andrés Solórzano
Am J Sci 2024; 324:5 https://doi.org/10.2475/001c.115328
https://ajsonline.org/article/115328

03/25/2024

New Paper: Petrogenesis of the Early Paleogene North Island Syenite Complex, Seychelles by J. Gregory Shellnutt, Tung-Yi Lee, Yoshiyuki Iizuka, Hao-Yang Lee, Chi Thi Pham, and Kenshi Suga
Am J Sci 2024; 324:4 https://doi.org/10.2475/001c.94773
https://ajsonline.org/article/94773
"The North Island Syenite complex was derived by fractional crystallization of a mafic alkaline parental magma and is representative of an Early Paleogene closed system magma chamber."

02/26/2024

New Paper: Late Ediacaran to Early Cambrian Breakup Sequences and Establishment of the Eastern Laurentian Passive Margin, Newfoundland, Canada by Maya Soukup, Luke P. Beranek, Stefanie Lode, Dylan Goudie, and David Grant
Am J Sci 2024; 324:3 https://doi.org/10.2475/001c.93038
https://ajsonline.org/article/93038
"The magma-poor, eastern Laurentian margin resulted from polyphase rifting, which culminated with the deposition of Ediacaran to Cambrian breakup sequences that formed in response to crust and mantle rupture events."

02/22/2024

New Paper:Fluid-mineral Equilibrium Under Nonhydrostatic Stress: Insight From Molecular Dynamics by Mattia L. Mazzucchelli, Evangelos Moulas, Boris J. P. Kaus, and Thomas Speck
Am J Sci 2024; 324:2 https://doi.org/10.2475/001c.92881
https://ajsonline.org/article/92881
"The direct effect of nonhydrostatic stress on mineral reactions is evaluated with molecular dynamics simulations of solid-fluid systems, with implications on the use of thermodynamic pressure in geodynamic models."

01/25/2024

New Paper:One Million Years of Climate-Driven Rock Uplift Rate Variation on the Wasatch Fault Revealed by Fluvial Topography by Adam G. G. Smith, Matthew Fox, Jeffrey R. Moore, Scott R. Miller, Liran Goren, Matthew C. Morriss, Andrew Carter
Am J Sci 2024; 324:1 https://doi.org/10.2475/001c.92194
https://ajsonline.org/article/92194
"Rock uplift rate histories derived from fluvial topography reveal that pluvial lakes influenced Wasatch Fault behavior throughout the mid-late Pleistocene, and that bedload/bedrock contrasts predict differences in erodibility."

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