ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] GEOLOGICAL and petrographical investigations have shown that the residues of the higher plants and the microplants (Ölalgen) have both played a part in coal formation: coals formed from the former have been called humus coals, while those from the latter are known as sapropelite coals. ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/159536a0