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ID number:202694
 
Author:
Evaluation:
Published: 19.04.2007.
Language: Latvian
Level: Secondary school
Literature: n/a
References: Not used
Extract

Sastāvs:
Sīkgraudains, mālains vai kramains nogulumiezis;
Satur 10 – 40% (reizēm pat līdz 80%) organisko vielu;
Minerālo daļu veido smalkgraudains kaļķakmens, dolomīti, māls, laukšpati, pirīti;
Kvalitāti raksturo mitrums, sadedzes siltums, sēra saturs, pelnu un darvas daudzums;
Jo vairāk ir organisko vielu un lielāki ir tā gabali, jo labāk degslāneklis deg.




Veidošanās:
Ir visos ģeoloģisko periodu nogulumos, sākot no kembrija;
Veidojās līdz 50 m dziļos ūdens baseinos siltā klimatā;...

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