Geology Commons^™

The Use Of Laja In Construction In Ancient Mesoamerica: A View From The Southern Gulf Lowlands Of Veracruz, Mexico, Lauren E. Smith

Steeplechase: An ORCA Student Journal

The archaeology of the southern Gulf lowlands of Veracruz, Mexico is notable for its research pertaining to the Olmec culture (Jaime-Riveron 2016; Loughlin 2012; Pool 2006). The region was home to the Colossal Olmec Heads: large, easily identifiable sculptures crafted from the volcanic rock of the Tuxtlas Volcanic Field. The use of volcanic resources in such grand presentations may instill a bias in the research of some archaeologists, but it is important to consider how these and other volcanic resources might have been used in everyday life (e.g., Jaime-Riveron 2016: 86). The consolidated volcanic ash in this region is referred …

Textural Investigation Into Rapid Welding Transitions In The Tuff Of Leslie Gulch Along Succor Creek At The Mahogany Mountain-Three Fingers Rhyolite Field, Southeastern Oregon, Alicia J. Martinez-Garling, Martin J. Streck

Student Research Symposium

The Mahogany Mountain-Three Fingers Rhyolite Field (MM-TFrf) in southeastern Oregon, associated with mid-Miocene rhyolite activity and Columbia River flood basalts, has been the subject of geological scrutiny. Previous studies proposed separate origins for the tuff of Leslie Gulch (LGT) and Spring Creek, but Benson and Mahood (2006) suggested a single ignimbrite event at 15.8 Ma, prompting a reassessment of MM-TFrf's history. This research focuses on LGT, investigating textural disparities between welded and non-welded tuff formations. Petrographic examinations delve into the transformation stages of pyroclastic tuff deposition, revealing the dynamic influences of volcanological and magmatic processes on welded and non-welded tuff …

Analyzing Intensifying Storm Events Correlation To Landslide Frequency In Portland’S West Hills, Aurora Villa Juan

Student Research Symposium

As the Pacific Northwest climate changes, extreme weather, such as intensifying storms, and a shift in the type of precipitation experienced with warmer winters causing more precipitation to fall as rain instead of snow, may lead to an increased frequency of landslides. There have been several recent landslides in Portland, noticeable to the public, particularly in areas of high elevation such as Council Crest, which stands at 1,073 feet. Additionally, residents of neighboring homes have observed changes in the landscape, including those on private properties. To better safeguard both public and private property, comprehensive research and mitigation efforts are required. …

Investigating Changes In Surface Water Chemistry Across The Llano Uplift And The Balcones Fault Zone In Central Texas Using Strontium And Uranium Isotopes, Hao Tuan Pham

Open Access Theses & Dissertations

The landscape of central Texas is shaped by over one billion years of Earth's history. An array of lithology lies within central Texas along with two large geological structures. The Llano Uplift, characterized by Proterozoic metamorphic and igneous rocks dating back to 1.37 billion years ago, is encircled by Paleozoic and Mesozoic sedimentary rocks. To the southeast of the Llano Uplift lies the Balcones Fault Zone (BFZ), an extensional structural system of mostly normal faults that delineates the transition between Paleozoic-Mesozoic sedimentary rocks and Cenozoic sedimentary cover, which are influential to the regional hydrogeology. This study investigates the hydrogeological dynamics …

The Use Of Laja In Construction In Ancient Mesoamerica: A View From The Southern Gulf Lowlands Of Veracruz, Mexico, Lauren Smith

Honors College Theses

The archaeology of the southern Gulf lowlands of Veracruz, Mexico is notable for its research pertaining to the Olmec culture (Jaime-Riveron 2016; Loughlin 2012; Pool 2006). The region was home to the Colossal Olmec Heads: large, easily identifiable sculptures crafted from the volcanic rock of the Tuxtlas Volcanic Field. The use of volcanic resources in such grand presentations may instill a bias in the research of some archaeologists, but it is important to consider how these and other volcanic resources might have been used in everyday life (e.g., Jaime-Riveron 2016: 86). The consolidated volcanic ash in this region is referred …

Publications And Other Works By R. F. Diffendal, Jr., Robert F. Diffendal Jr.

School of Natural Resources: Faculty Publications

Articles
Chapters in Books
Books
Field Guides
Geologic Maps
Other Maps
Cover Photographs
Other Photographs
Newspaper and Other Articles
Test-Hole Logs
Television Programs
Geonotes
Abstracts
Reviews
Manuscripts Accepted (A), Submitted (S), or in Preparation (P)
Geologic Maps in Press
Geologic Maps-Nebraska
Public Documents
Miscellaneous Publications
Editing

Updated March 2024

Joint Map Of Hardin County, Kentucky, Steven L. Martin, Emily Morris

Map and Chart--KGS

New field mapping of joints with previously published joint and fault locations. This fracture map can be used as a critical data source for hydrological, karst or geotechnical applications. Joint orientations were measured in 2009, 2022 and 2023, and are combined with joint and fault locations for Hardin County, Kentucky from 1:24,000-scale USGS geologic quadrangle maps that were published from 1962 to 1977. The geologic quadrangle maps for the county were digitized from 2002 to 2007.

The geology of Hardin County consists of Upper Devonian New Albany Shale overlain by Lower to Upper Mississippian-age sequences of limestone, dolomite, sandstone and …

250, Scott Brande

All 3D Rock Models

Model 250 - anthracite - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/250-a7f41cbcebd449eda33f60c19c9d33f9

Uqsees-1, Scott Brande

All 3D Rock Models

Model UQSEES-1 - granite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/uqsees-1-cb8d8e00ce0340f4b6ffd3b95e0d890d

149, Scott Brande

All 3D Rock Models

Model 149 - pegmatite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/149-eea34817eff94fd49ba8117d0de7a7ad

153, Scott Brande

All 3D Rock Models

Model 153 - peridotite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/153-352bbb86b3bf42239154c9b226f18881

161, Scott Brande

All 3D Rock Models

Model 161 - bituminous coal - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/161-2393ea8889df42b186b9dcd19afeebb6

170, Scott Brande

All 3D Rock Models

Model 170 - chalk - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/170-df8b420304fd4e6fb879981978811f74

Uqsees-P8, Scott Brande

All 3D Rock Models

Model UQSEES-P8 - obsidian - igneous rock

SketchFab link: https://sketchfab.com/3d-models/uqsees-p8-427b9a83af65469c9124945cf1d648ef

195, Scott Brande

All 3D Rock Models

Model 195 - travertine - sedimentary rock

SketchFab link: https://sketchfab.com/3d-models/195-8012a646b8d4422396efe1d939f9f947

255, Scott Brande

All 3D Rock Models

Model 255 - hornfels - metamorphic rock

SketchFab link: https://sketchfab.com/3d-models/255-92eb561fa0234e15b68b1bef86bd3ca7

102, Scott Brande

All 3D Rock Models

Model 102 - basalt - ingeous rock

SketchFab link: https://sketchfab.com/3d-models/102-d6075cf341ac4bd9b738cc436ee8b796

110, Scott Brande

All 3D Rock Models

Model 110 - rhyolite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/110-3a727823e7f744ea86c0b7c4b815c9bc

117, Scott Brande

All 3D Rock Models

Model 117 - gabbro - igneous rock

SketchFab link: https://sketchfab.com/3d-models/117-7aa0c6791f984aabbd11afd11efae604

118, Scott Brande

All 3D Rock Models

Model 118 - gabbro - igneous rock

SketchFab link: https://sketchfab.com/3d-models/118-1581789f63c4446d9fd60d6a9926f06c

120, Scott Brande

All 3D Rock Models

Model 120 - granite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/120-5fc8bd01a11b4e26b63f971f49205152

125, Scott Brande

All 3D Rock Models

Model 125 - peridotite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/125-492cb73d2ecf4ef099673671533e0fb9

127, Scott Brande

All 3D Rock Models

Model 127 - diorite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/127-21c97cc7e71241d7a9f3925165df9a3f

111, Scott Brande

All 3D Rock Models

Model 111 - andesite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/111-510ba461f1d94a729070b0f30ef0b4e6

128, Scott Brande

All 3D Rock Models

Model 128 - gabbro - igneous rock

SketchFab link: https://sketchfab.com/3d-models/128-3bcbedd3249e4254bffa3233a6977a9e

Daal, Scott Brande

All 3D Rock Models

Model DAAL - gabbro - igneous rock

SketchFab link: https://sketchfab.com/3d-models/daal-1-71e1bddbca0b486bb085fd1deb471124

124, Scott Brande

All 3D Rock Models

Model 124 - peridotite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/124-f0f053e2206944f888962f46273686d3

132, Scott Brande

All 3D Rock Models

Model 132 - diorite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/132-330f669b9a684e15a96684a20214ca86

134, Scott Brande

All 3D Rock Models

Model 134 - pumice - igneous rock

SketchFab link: https://sketchfab.com/3d-models/134-c3a2828764bd4e74a43dd32520e0cbf5

130, Scott Brande

All 3D Rock Models

Model 130 - pegmatite - igneous rock

SketchFab link: https://sketchfab.com/3d-models/130-a7623f4cc0c54544bf5bd1180391f007