31. Latitudinal grooves are also found on carbonate concretions found in Schoharie County, New York. 32. The rover indeed found layered rocks and marble-or blueberry-like hematite concretions . 33. In addition, possible remains of Mangrove roots have been found encased in siderite concretions . 34. This caused concretions containing plant material to form and preserve as rounded lumps of stone. 35. He was an expert in the field of the creation of marine Manganese nodule concretions . 36. Unlike the Moeraki boulders, some of these concretions contain the bones of mosasaurs and plesiosaurs. 37. Evidence suggests that microbial metabolism may have contributed to the formation of some of these concretions . 38. The hemispherical voids and pits result from the selective dissolution of carbonate concretions within the greywacke. 39. The concretions are calcareous and range from 0.125 cm 3 to 125 cm 3. 40. The concretions from the Barstow Formation preserve both allochthonous arthropod communities and rare autochthonous arthropod communities.
