This layer has the highest level of Total organic carbon (TOC), indicating it was deposited in a restricted and stagnant area with little water movement.

Overall, the Coimbra Formation is made up of shallow marine deposits formed in a low-energy setting, with occasional stronger events like storms or floods.

Over time, open-marine conditions increased, with more typical marine fossils reflecting a significant rise in sea level.

[8] Individual Stromatolite mounds are clearly defined, either as separate structures lined up next to each other or as irregular, flat to wavy layers that merge at the base.

[6] The recent discovery of Dinosaur tracks revelated the presence of supratidal environments located in a shallow, tropical coastal area, likely near the shore.