<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
mads.xsd"><authority><topic authority="http://AATesaurus.cultura.gencat.cat/aat/getty_en">Carboniferous limestone</topic></authority><related type="broader"><topic>limestone by location</topic></related><variant type="other"><topic>limestone, Carboniferous</topic></variant> <note xml:lang="en"><![CDATA[ Limestone having a light gray color, occurring widely throughout Great Britain and Ireland, in deposits dating to the Dinantian Epoch of the Carboniferous Period, from about 345 to 280 million years ago. ]]></note></mads>