We would expect estuarian signatures to fall between the 87 Sr/ 86 Sr signature of the Amazon mouth and the global marine signature except very near the mouth of the Tocantins.
Source: wiktionary
Estuarian
//ˌɛs.tjʊˈɛəɹi.ən//
Synonyms for "estuarian" (2 found)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.