Tertiary fossil insects from Argentina

Clicks: 1
ID: 299184
1926
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

Ranked #6,123 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 FEW years ago Mr. Geo. L. Harrington, of Buenos Aires, was prospecting in the Santa Barbara district of the Province of Jujuy, Argentina. In this region we find deep gulches with good exposures of the geological formations. A very conspicuous and important formation consists of green rock, easily breaking up into small angular fragments, commonly with conchoidal fracture. In its upper part it shows streaks of red, increasing until we reach an entirely red deposit. We interpret this as indicating increasing aridity, culminating in desert conditions with wind-blown sands. The red rock appears to be without fossils, and above it is a great mass (possibly 2000 feet) of yellowish deposit of more recent date. Dr. G. Bonarelli (1921) placed the green rock in the upper division of his Calcareo-Dolomitic horizon, but owing to the absence of fossils the age remained unknown. Mr. Harrington, following up the gulch which runs west from Sunchal, came upon a little deposit of fossil insects, and collected a number of specimens. Most of these were eventually transmitted to the U.S. National Museum, whence they were sent to me for study. They were found to consist of seven species of beetles and a caddis fly, almost certainly of Tertiary age. The horizon, was in the typical portion of the green formation, where it is interbedded at intervals with heavy limestone.
Reference Key
openalex_W2061836163 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors T. D. A. Cockerell
Journal american journal of science
Year 1926
DOI
10.2475/ajs.s5-11.66.501
URL
https://doi.org/10.2475/ajs.s5-11.66.501
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.