estuarine

Slowly this sea shallowed, giving rise to the alternating estuarine marine and freshwater deposits of the Coal Measures.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 4|Various
Thus in these lowland or estuarine peat-mosses the moss eventually occupies the water, and goes on growing.
The Romance of Plant Life|G. F. Scott Elliot
The chief interest in estuarine conditions is the mingling of sea and fresh water.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7|Various
We might therefore expect to find coal wherever strata of estuarine origin are developed in great mass.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 5|Various

Whether these are marine, lacustrine, or estuarine deposits, there is hardly sufficient evidence to show.
Early Days in North Queensland|Edward Palmer

British Dictionary definitions for estuarine

estuarine

/ (ˈɛstjʊəˌraɪn, -rɪn) /

adjective

formed or deposited in an estuaryestuarine muds

growing in, inhabiting, or found in an estuaryan estuarine fauna

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012