The little animals fossilized and are now embedded in the limestone.
Examples of fossilize
fossilize
This is because they fossilize poorly due to their small size and fragility.
From the nature.com
When an animal dies, its porous bones absorb groundwater as they fossilize.
From the sciencedaily.com
It can fossilize, or cease developing, in any of its developmental stages.
From the en.wikipedia.org
They have therefore had exactly the same time in which to fossilize as all other animals.
From the newsweek.com
Nudibranchs do not fossilize well, and we do not have any definitive fossils of nudibranchs.
From the scientistatwork.blogs.nytimes.com
Sardar believes that present-day Islamic societies have allowed creative thinking to fossilize.
From the en.wikipedia.org
Within several months, the ash will simply blow away into the atmospheric background or fossilize to form new rock.
From the newsweek.com
Don't expect him to fossilize overnight.
From the forbes.com
This is because only a tiny percentage of animals ever fossilize, and most of these remain buried in the earth.
From the en.wikipedia.org
More examples
Convert to a fossil; "The little animals fossilized and are now embedded in the limestone"
Become mentally inflexible
(fossilized) set in a rigidly conventional pattern of behavior, habits, or beliefs; "obsolete fossilized ways"; "an ossified bureaucratic system"
(fossilization) the process of fossilizing a plant or animal that existed in some earlier age; the process of being turned to stone
(fossilization) becoming inflexible or out of date
Fossils (from Latin fossus, literally "having been dug up") are the preserved remains or traces of animals, plants, and other organisms from the remote past. ...
(Fossilization (linguistics)) In linguistic morphology, fossilization refers to two close notions. One is preserving of ancient linguistic features which have lost their grammatical functions in language. Another is loss of productivity of a grammatical paradigm (e.g. ...
(Fossilized) Organic remains from an ancient geologic period, such as a insects, skeletons or even plants that become preserved over time and hardened into a stone-like substance.
(fossilized) In the context of fine jewelry making, this may refer to two different things. It can refer to the creation of a visual effect of age or wear, such as a patina or other distressed treatment. ...