The best replacement for carbonates is clastics.

The best alternatives to carbonates are rated as following:
★★★★★  clastics

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Speaking about carbonates, one probably shouldn't forget about acids.

Other search terms related to carbonates and their ratings are:
★★★★★ acids
You have in mind a companion for carbonates and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of carbonates in all years. Click on graph for more.
carbonates
clastics