Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho
Bibliographic record
Abstract
Research Article| September 01, 2000 Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho P.T. Doughty; P.T. Doughty 1Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar R.A. Price R.A. Price 1Department of Geological Sciences, Queen's University, Kingston, Ontario K7L 3N6, Canada Search for other works by this author on: GSW Google Scholar GSA Bulletin (2000) 112 (9): 1356–1374. https://doi.org/10.1130/0016-7606(2000)112<1356:GOTPTR>2.0.CO;2 Article history received: 31 Mar 1997 rev-recd: 24 Apr 1999 accepted: 01 Nov 1999 first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation P.T. Doughty, R.A. Price; Geology of the Purcell Trench rift valley and Sandpoint Conglomerate: Eocene en echelon normal faulting and synrift sedimentation along the eastern flank of the Priest River metamorphic complex, northern Idaho. GSA Bulletin 2000;; 112 (9): 1356–1374. doi: https://doi.org/10.1130/0016-7606(2000)112<1356:GOTPTR>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract The Priest River metamorphic complex is separated from less metamorphosed rocks to the east by the Purcell Trench, a north-trending, glaciated valley. Between Sandpoint and Bonners Ferry, Idaho, exposures of variably dipping Sandpoint Conglomerate are juxtaposed with mid-crustal metamorphic rocks that extend across the valley. The presence and location of faulting in the Purcell Trench have been controversial, and the age and tectonic significance of the Sandpoint Conglomerate have been enigmatic. New geologic mapping, metamorphic thermobarometry, and 40Ar/39Ar thermochronology verify the existence and location of the Eocene (45–55 Ma) east-dipping Purcell Trench normal fault zone, which consists of en echelon, right-stepping northern and southern fault segments. An unfaulted east-dipping homocline occupies the gap between them. It formed in the footwall of the west-dipping East Newport normal fault, which roots on the opposite side of the metamorphic culmination. "Chrontours" of K-Ar and 40Ar/39Ar cooling dates record progressive and nearly synchronous Eocene quenching of the metamorphic infrastructure as it was being exhumed by both the East Newport and the Purcell Trench normal faults. The Sandpoint Conglomerate is an Eocene basin-fill deposit that accumulated above the East Newport fault. Displacement on the east-dipping southern Purcell Trench fault eventually propagated across the footwall of the East Newport fault, transferring the Sandpoint Conglomerate to the hanging wall of the southern Purcell Trench fault and stranding it in the Purcell Trench. These relationships, which provide new insights on the process of extensional exhumation, should be helpful in tectonic interpretations of the Cordillera and other orogenic belts. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.003 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.007 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".