Iowa Blastoid Identification
Blastoid is a realistic Iowa fossil profile built around bud-shaped echinoderm with petal-like ambulacra preserved in limestone. In this state, success usually comes from learning Silurian and Devonian limestones, shale cuts, and glacial gravels, then timing runoff, reservoir drawdown, surf cuts, or road work that exposes fresh fossil-bearing rock instead of hunting blindly.
Key Traits
- ●bud shape
- ●five petaloid grooves
- ●small attachment point
- ●Check Silurian and Devonian limestones, shale cuts, and glacial gravels
Era
Mississippian
Type
echinoderm
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