Taconic events in Pennsylvania: Datable phases of a 20 m.y. orogeny

Clicks: 2
ID: 302344
2008
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #8,149 of 8,486 articles by views in american journal of science

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 8,486 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
A suite of well-dated graptolite and conodont locations allows division of about 54 m.y. of Late Cambrian through Late Ordovician events into three time segments in Pennsylvania: 1) Pre-Taconic, offshore deepwater sediments including olistostromes were deposited and deformed in several offshore domains in Iapetus (*sensu lato*) from ∼ 497 to ∼ 459 Ma; 2) Taconic Phase I began as these rocks were translated onto the foreland as allochthons, some with piggyback basins from ∼ 459 to ∼ 450 Ma. This was accomplished first by thrusting onto the shelf edge, creating a foreland peripheral bulge and local depositional basins, then by depressing the larger foreland region to allow emplacement of allochthons of the Dauphin Formation (the erroneous "Hamburg klippe" of past literature), and finally with deposition of the thick, widespread fill of the traditional Martinsburg Formation; 3) Taconic Phase II advanced diachronously across the foreland with regional overturning and nappe formation (the classic "Taconic" orogeny in Pennsylvania), driven as the ongoing collision overrode and incorporated the platform and its foreland basin into alpine-scale nappes. This phase started at ∼ 459 Ma at the shelf edge and lasted from ∼450 to ∼ 443 Ma in the present location of the Great Valley foreland and eastward. This series of well-dated events may be a model for timing of a "simple" orogenic cycle in a convergent margin with application to other parts of the Appalachians and beyond.
Reference Key
openalex_W1972997813 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors G. Robert Ganis, Donald U. Wise
Journal american journal of science
Year 2008
DOI
10.2475/02.2008.03
URL
https://ajs.scholasticahq.com/article/61731.pdf
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.