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Showing results for tags 'slates'.
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I was reading one of my textbooks and specifically a chapter about the Carboniferous. There was a photo of seeds next to ferns and I was surprised about how large they were compared to common fern leaves. Then I remembered when peeling up shale/slate in the local stream, I found a rock with several oval pebbles. I thought maybe these were rocks or concretions. After seeing the photo, are some of these perhaps seeds? They also have a line that seems to split them laterally.