Where a primary source presents material from a first-hand witness to a phenomenon, and a secondary source provides commentary, analysis and criticism of primary sources, a tertiary source is a selection and compilation of primary and secondary sources. While the distinction between primary source and secondary source is essential in historiography, the distinction between these sources of evidence and tertiary sources is more peripheral, and is more relevant to the practice of scholarship than to the content. In historical scholarship, a primary source is a document or other source of information that was created at or near the time being studied, often by the people being studied. ... Secondary sources is a term used in historical scholarship to refer to works of history written as synthetic accounts, based on primary sources and usually the consultation of other secondary sources. ... Historiography is the study of the way history is and has been written. ...
Typical instances of tertiary sources are bibliographies, library catalogs, directories, reading lists and survey articles. Encyclopedias and textbooks are examples of materials that typically embrace both secondary and tertiary sources, presenting on the one hand commentary and analysis, while on the other attempting to provide a synoptic overview of the material available on the topic. For instance, the long articles of the Encyclopædia Britannica certainly constitute the kind of analytical material characteristic of secondary sources, whilst they also attempt to provide the kind of comprehensive coverage associated with tertiary sources. Brockhaus Konversations-Lexikon, 1902 An encyclopedia or encyclopaedia, also (rarely) encyclopædia,[1] is a comprehensive written compendium that contains information on all branches of knowledge or a particular branch of knowledge. ... The examples and perspective in this article or section may not represent a worldwide view. ... 1913 advertisement for the 11th edition, with the slogan When in doubt — look it up in the Encyclopædia Britannica The Encyclopædia Britannica (properly spelled with æ, the ae-ligature) was first published in 1768–1771 as The Britannica was an important early English-language general encyclopedia and is still...
Historiography is the study of the way history is and has been written. ... A source text is text (usually written but sometimes oral) from which information or ideas are derived. ... In historical scholarship, a primary source is a document or other source of information that was created at or near the time being studied, often by the people being studied. ... Secondary sources is a term used in historical scholarship to refer to works of history written as synthetic accounts, based on primary sources and usually the consultation of other secondary sources. ...
It is not likely that these rocks are stained from migrated oil based on their low free oil contents and high generation potentials, but this cannot be ascertained in the absence of extracted rock TOC and Rock-Eval data as well as gas chromatographic fingerprints and more detailed evaluation of biomarker results.
This higher level of conversion of the Tertiary rocks might be indicative of a more labile kerogen that decomposes under lower thermal stress than more refractory (difficult to crack) Type II kerogens.
Tertiary potential source rocks have a higher level of apparent conversion based on the higher normalized oil contents (this presumes that the free oil is indigenous).
Gross tertiary graduation ratio (first degree), is total number of graduates (total, male, female) from first degree programmes at ISCED 97 level 5A, regardless of age, expressed as a percentage of the population (total, male, female) at the theoretical graduation age for such programmes.
Tertiary education, teachers is the number of persons employed full-time or part-time in an official capacity for the purpose of guiding and directing the learning experience of pupils, irrespective of his/her qualification or the delivery mechanism, i.e.
Tertiary education, teachers (% female) is the number of female teachers in tertiary education, expressed as a percentage of total number of teachers in tertiary education in a given school year.
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