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A new species of Precambrian macrofossil, previously described informally as a ‘string of beads’, is here assigned to the genus Horodyskia Yochelson and Fedonkin, 2000, and formally named Horodyskia williamsii. It is known from Mesoproterozoic siliciclastic rocks that are older than 1070 MYA and younger than 1465 MYA; Horodyskia was first found in the Ashburton region of Western Australia. The fossils are most commonly found as impressions on the sole of thin, frequently ripple-marked, sandstones. Very rarely, they are present as traces on the tops of sandstone beds. At some localities, there are thin, silty partings separating the sandstone beds. Some strings are current oriented, but commonly most strings crosscut current directions. Much of the observed variation appears to be taphonomic.
2.5 x 2.5 inches
Class: Not Specified
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