Mazantic Shale

{{Short description|Geologic formation in Chiapas, Mexico}}

{{Primary sources|date=December 2023}}

{{Infobox rockunit

| name = Mazantic Shale

| image =

| caption =

| type = Formation

| age = Miocene,
{{fossilrange|Aquitanian}}

| period = Miocene

| prilithology =Shale

| otherlithology =

| namedfor =

| namedby =

| region =

| country = Mexico

| coordinates =

| unitof =

| subunits =

| underlies =Balumtum Sandstone

| overlies =La Quinta Formation

| thickness =310 m

| extent =

| area =

| map =

| map_caption =

}}

The Mazantic Shale is a geologic formation in Chiapas, Mexico.{{cite web|title= Fossilworks: Gateway to the Paleobiology Database|author= ((Various Contributors to the Paleobiology Database))|url= https://www.fossilworks.org|access-date= 17 December 2021}} It was deposited during the Early Miocene (Aquitanian). The formation comprises dark gray shales that were deposited in a marine environment. It preserves fossils, such as the turtle Allaeochelys liliae. Amber has been recovered from it.{{Cite journal|author1=Gerardo Carbot-Chanona |author2=Gustavo Rivera-Velázquez |author3=Eduardo Jiménez-Hidalgo |author4=Víctor Hugo Reynoso |year=2020 |title=The first Pan-Carettochelys turtle in the Neogene of the American continent and its paleobiogeographical relevance |journal=Journal of South American Earth Sciences |volume=104 |pages=Article 102925 |doi=10.1016/j.jsames.2020.102925 |bibcode=2020JSAES.10402925C |s2cid=224976641 }}