
1) Limestone formation
Found on
https://www.crosswordclues.com/clue/eozoon

• (n.) A peculiar structure found in the Archaean limestones of Canada and other regions. By some geologists it is believed to be a species of gigantic Foraminifera, but others consider it a concretion, without organic structure.
Found on
http://thinkexist.com/dictionary/meaning/eozoon/
E`o·zo'ön noun ;
plural Eozoöns , Latin
Eozoa . [ New Latin , from Greek
'hw`s dawn +
zw^,on an animal.]
(Paleon.) A peculiar structure found in the Archæan limestones of Canada and other regions. By some geologists it is believed to be a sp...
Found on
http://www.encyclo.co.uk/webster/E/52

eozoon A peculiar structure found in the Archaean limestones of Canada and other regions. According to some geologists, it is believed to be a species of gigantic Foraminifera, but others consider it a concretion, without organic structure. Foraminifera (single-celled planktonic animals with perforated chalky shells) consist of an extensive order ...
Found on
http://www.wordinfo.info/words/index/info/view_unit/738/
No exact match found.