Results 81 to 90 of about 69,839 (285)

Ichnological insights into deoxygenation across the Cenomanian–Turonian Boundary Oceanic Anoxic Event 2 in the northern extent of Western Interior Seaway (west‐central Alberta)

Sedimentology, Volume 73, Issue 2, Page 355-390, February 2026.
ABSTRACT In‐depth ichnological and sedimentological analyses of the Cenomanian–Turonian boundary Oceanic Anoxic Event (OAE2) from the Western Interior Seaway of west‐central Alberta reveal a persistent physico‐chemically stressed setting. The interval is characterised by a dominantly diminutive and diminished ichnological assemblage, with familiar ...
Sara K. Biddle, Murray K. Gingras
wiley   +1 more source

Clay minerals and other hydrous alteration products in the Kaba meteorite: Review of the literature and new XRD investigations

Open Astronomy, 2023
The present study is a review of publications regarding special aspects of the mineralogy of the Kaba meteorite, clay minerals, hydrous phases, and organic matter.
Viczián István, Kristály Ferenc
doaj   +1 more source

Thermal alteration of CM carbonaceous chondrites: Mineralogical changes and metamorphic temperatures [PDF]

, 2021
A. King, P. Schofield, S. Russell
semanticscholar   +1 more source

The Compositional Structure of the Asteroid Belt

, 2015
The past decade has brought major improvements in large-scale asteroid discovery and characterization with over half a million known asteroids and over 100,000 with some measurement of physical characterization.
Alexander, Conel M. O'D., Binzel, Richard P., Chapman, Clark R., DeMeo, Francesca E., Walsh, Kevin J.   +4 more
core   +1 more source

Mineralogical Characterization and Phase Angle Study of Two Binary Near-Earth Asteroids, Potential Targets for NASA’s Janus Mission

The Planetary Science Journal, 2023
Ground-based characterization of spacecraft targets prior to mission operations is critical to properly plan and execute measurements. Understanding surface properties, such as mineralogical composition and phase curves (expected brightness at different ...
Lucille Le Corre, Juan A. Sanchez, Vishnu Reddy, Adam Battle, David C. Cantillo, Benjamin Sharkey, Robert Jedicke, Daniel J. Scheeres   +7 more
doaj   +1 more source

Discovery of primitive CO ₂ -bearing fluid in an aqueously altered carbonaceous chondrite [PDF]

, 2021
A. Tsuchiyama, Akira Miyake, Satoshi Okuzumi, Akira Kitayama, Jun Kawano, Kentaro Uesugi, Akihisa Takeuchi, Tsukasa Nakano, M. E. Zolensky   +8 more
openalex   +1 more source

Type 1 aqueous alteration in CM carbonaceous chondrites: Implications for the evolution of water‐rich asteroids

, 2017
The CM carbonaceous chondrite meteorites experienced aqueous alteration in the early solar system. They range from mildly altered type 2 to almost completely hydrated type 1 chondrites, and offer a record of geochemical conditions on water‐rich asteroids.
A. J. King, P. Schofield, S. S. Russell
semanticscholar   +1 more source

Composition of Near-Earth Asteroid 2008 EV5: Potential target for Robotic and Human Exploration

, 2012
We observed potentially hazardous asteroid (PHA) 2008 EV5 in the visible (0.30-0.92 microns) and near-IR (0.75-2.5 microns) wavelengths to determine its surface composition. This asteroid is especially interesting because it is a potential target for two
Benner, Bonnie J. Buratti, Busch, Cloutis, Cushing, Gaffey, Gaffey, Gaffey, Hicks, Kenneth Lawrence, Larson, Lucille Le Corre, Michael Hicks, Michael J. Gaffey, Oke, Ostro, Paul A. Abell, Paul S. Hardersen, Pravec, Rayner, Reddy, Rubin, Sanchez, Shepard, Somers, Vishnu Reddy, Weisberg, Weisberg   +27 more
core   +1 more source

New Zealand's Second Meteorite: Makarewa (find, L4, S5, W2)

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, January 2026.
One of the most remarkable discoveries of a meteorite in New Zealand was that of Makarewa. Discovered in 1879, Makarewa is a ‘find’ that was uncovered a metre below the surface of a clay bank during excavation works for a train line in the southern South Island.
Mia R. E. Boothroyd, James M. Scott, Marshall C. Palmer, Rasmus Andreason   +3 more
wiley   +1 more source

Silicon isotopic compositions of chondrule silicates in carbonaceous chondrites and the formation of primordial solids in the accretion disk [PDF]

, 2021
Johan Villeneuve, Yves Marrocchi, Emmanuel Jacquet   +2 more
openalex   +1 more source