Regional Structural Orientation of the Mount Sharp Group Revealed by In Situ Dip Measurements and Stratigraphic Correlations on the Vera Rubin Ridge

Ground‐based bedding orientation measurements are critical to determine the geologic history and processes of sedimentation in Gale crater, Mars. We constrain the dip of lacustrine strata of the Blunts Point, Pettegrove Point, and Jura members of the Murray formation using a combination of regional stratigraphic correlations and bed attitude measurements from stereo Mastcam images taken by the Mars Science Laboratory Curiosity rover. In situ bed attitude measurements using a principal component analysis‐based regression method reveal a wide range of dips and dip azimuths owing to a combination of high stereo errors, postdepositional deformation of strata (e.g., fracturing, rotation, and impact cratering), and different primary depositional dips. These constrain regional dips to be within several degrees of horizontal on average. Stratigraphic correlations between targets observed in the Glen Torridon trough and at the Pettegrove Point‐Jura member contact of Vera Rubin ridge (VRR) constrain dips to be between 3°SE and 2°NW, consistent with nearly flat strata deposited horizontally on an equipotential surface. The Jura member is determined to be stratigraphically equivalent to the northern portion of the Glen Torridon trough. Rover‐based dip magnitudes are generally significantly shallower than the orientation of VRR member contacts measured from High Resolution Imaging Science Experiment‐based traces, suggesting the sedimentary strata and VRR member contacts may be discordant

Interactive visualization of Crystal Knob xenoliths project

Files for interactive visualization of the Crystal Knob xenolith project

Thesis Plate 2: Stratigraphic columns of the Zebra Nappe, Southern Naukluft Mountains, Namibia

Website containing stratigraphic columns for the southern Naukluft Mountains, Namibia

Code for Crystal Knob xenoliths project

Code repository for creating the analytical results of the Crystal Knob xenolith project

davenquinn/Orienteer beta

GIS application for managing uncertain orientation

Microprobe Data for Xenoliths Web Application Source

This application allows the inspection and tagging of electron microprobe data for samples gathered at Crystal Knob, in the Salinian Block. You can view the interactive application at https://doi.org/10.7907/16e8-hn8

Database for Crystal Knob xenoliths project

PostgreSQL/PostGIS (10.0/2.4) database binary dump file containing analytical data and model results for Crystal Knob xenolith project. The database contains analytical microprobe and SIMS data, mapping data for tectonic reconstructions, and results of finite-element and modeling runs. The data models and analysis code used to access this database is in an accompanying data record

Thesis Plate 1: Preliminary geologic map of the southern Naukluft Mountains

Web map of the southern part of the Naukluft Mountains created from fieldwork in 2015 and 2016

davenquinn/Attitude v0.4.0

Attitude is for fitting the orientation of planes

Building a multi‐scale, collaborative, and time‐integrated digital crust: The next stage of the Macrostrat data system

Abstract Macrostrat is a platform for deep‐time geoscientific research that integrates stratigraphic columns and geologic maps into a digital description of the crust. The database and supporting software track crustal evolution and provide location‐based geological information to geoscience end users. Macrostrat houses multiple scales of mapping and stratigraphic data, from continent‐ and basin level summaries to single quadrangles and measured sections. Currently, Macrostrat's primary data holdings consist of regional stratigraphic columns with a spatial footprint weighted heavily to North America. While the data are of sufficient scale and resolution to generate insights about Earth evolution, increasing resolution and expanding spatial coverage will allow a new generation of scientific and interpretive uses. The next phase of Macrostrat's development will increase the detail and complexity of Macrostrat's multiscale data holdings, largely by engaging a wider range of geoscientists in entering stratigraphic data. To support broad collaboration, we are building new web‐based software to assemble and visualize regional stratigraphic sequences, refine multiple working age models, and compose regional records from measured stratigraphic sections. These tools will allow Macrostrat to draw on the expertise of a wide range of geoscience workers and grow a dataset with global relevance and a variety of end uses. New capabilities will pave the way to processes for submission, review, coordination, and assimilation of community‐contributed stratigraphic datasets. Digital compilation of geological maps and columns requires substantial effort, and well‐designed systems for distributing this work in the geoscience community will allow Macrostrat to build more adaptable and scientifically relevant products