Sedimentology and petrography of early diagenetic chert and dolomite in the Late Cretaceous‐early Tertiary Amuri Limestone Gro
View of Potential siliceous sources during Prehistory: Results of prospecting in the East margin of the Ebro Basin (NE Iberian Peninsula) | Journal of Lithic Studies
![File:Chert nodule ("Indiana hornstone") (probably Mississippian; Indiana, USA) 4 (45494087022).jpg - Wikimedia Commons File:Chert nodule ("Indiana hornstone") (probably Mississippian; Indiana, USA) 4 (45494087022).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/a/ae/Chert_nodule_%28%22Indiana_hornstone%22%29_%28probably_Mississippian%3B_Indiana%2C_USA%29_4_%2845494087022%29.jpg/1200px-Chert_nodule_%28%22Indiana_hornstone%22%29_%28probably_Mississippian%3B_Indiana%2C_USA%29_4_%2845494087022%29.jpg)