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Stratigraphic Lexicons

On-Line regional stratigraphic units (formation “Lexicon”) sites

The definitions of regional formations (name, type location, characteristic lithology, age constraints) have been compiled for different regions.  These “stratigraphic unit databases” or “stratigraphic lexicons” are generally searchable.

 

Australia -- Geoscience Australia “Stratigraphic Units Database”
            http://www.ga.gov.au/oracle/stratnames/index.jsp
Search the Oracle database (http://dbforms.ga.gov.au/www/geodx.strat_units.int) by name, region, etc.  In addition to a summary of lithology (for most) and references, the returned page for each formation or member also includes navigation links to overlying/underling units.

 

New Zealand – GNS Science “New Zealand Stratigraphic Lexicon”
            http://data.gns.cri.nz/stratlex/
Search the database by name, region, age, etc.  The returned page for each formation or member provides references, but without a lithology summary.

 

Pakistan – Geological Survey of Pakistan “Stratigraphic Names”
            http://www.gsp.com.pk/pakistan/index.html
This text-listing by age gives lithology and type locality.  It does not indicate the groupings or which formations are above/below.

 

British Isles – British Geologic Survey “BGS Lexicon of Named Rock Units”
            http://www.bgs.ac.uk/lexicon/lexicon_intro.html
Search (http://www.bgs.ac.uk/lexicon/home.cfm) on rock name and age.  The returned page includes lithologic description, contacts, extent, type locality and references. 

 

United States – U.S. Geologic Survey “GEOLEX; National Geologic Map Database, Geologic Names Lexicon”
            http://ngmdb.usgs.gov/Geolex/geolex_home.html
Search the database by name, region, age, citation, etc.  The returned page for each formation or member provides references, but without a lithology summary.
The returned page gives age, type location and history; and the lithology summary is hidden under the “History” link.

 

Canada -- National Geological Surveys Committee, Canadian Geoscience Knowledge Network “WEBLEX Canada -- Lexicon of Canadian Geologic Names on-line”
            http://cgkn1.cgkn.net/weblex/weblex_e.pl
Search by name, region, age and/or author.  The returned page has lithology and age summaries, type location, extent and  references.

 

Austria – LithStrat
            http://www.univie.ac.at/geo/lithstrat/welcome.htm

 

Gulf PetroLink.com -- Middle East “Web-Lexicon”
            http://www.gulfpetrolink.net/mepr/index.htm
Charts and summary text from 3 articles published in GeoArabia (Sharland et al, 2004 “Arabian Plate Sequence Stratigraphy”; Haq and Al-Qahtani, 2005 “Phanerozoic cycles of sea-level change on the Arabian Platform; and Al-Husseini, 2008 “Middle East Geologic Time Scale”).  Not really a lexicon in the sense of the other on-line services, but an excellent regional stratigraphic chart suite.

 

Iraq – “Stratigraphic Lexicon of Iraq” (van Bellen et al., 1959)
            http://www.gulfpetrolink.net/spIraqvanbellen/spIraqvanbellenidx.htm
Tertiary by R.C. van Bellen; Mesozoic and Palaeozoic by H.V. Dunnington, R. Wetzel and D.M. Morton; under the direction of Louis Dubertret.

“In 1959, the Centre Nationale de Recherches Scientifique (CNRS) published the Stratigraphic Lexicon of Iraq by R.C. van Bellen, H.V. Dunnington, R. Wetzel and D.M. Morton.
This publication was part of an international series of lexicons that covered many countries worldwide.

Besides Iraq, the CNRS published several other Middle East lexicons in the 1960s and 1970s; these include Iran, Jordan, Lebanon, Qatar, Saudi Arabia, Syria, Turkey and Yemen.