FYI igneous rocks are below all sedimentary layers.
A beginner's mistake I'm sure.
But since we're going to selectively ignore the fact that igneous rocks are found below sediments then I guess we can talk about the footprints of Homo sapiens sapiens in Cambrian strata.
"Again on 1st June 1968, William Meister was climbing a cliff searching for trilobite fossils in the Wheeler Formation in Utah. He broke off a 5 cm thick lump of rock that split open in his hand revealing trilobite fossils embedded in the heel of a sandal print that had toe impressions poking over the edge. He called in Dr. Clifford Burdick, a consulting geologist who found several more sandal prints in the shaly limestone, and the footprints of barefoot children, one with a trilobite in the instep." -- Barry Setterfield, geologist, June 1998
"... we could also consider the shoe print, you know, that was found near Antelope Springs Utah by William Meister. And he found that in the year 1968. He was a researcher, a collector of fossils, and he was breaking open pieces of slate rock at this place Antelope Springs and when he broke open one piece of rock he found a shoe print. You know, my coauthor Richard Thompson went to visit William Meister in Utah and he was able to see this specimen, he was able to take photographs of it, and we did a computer analysis, and we showed that the shape of this impression in the rock is exactly like that of a shoe print. And if you look at your shoe, at the bottom of your shoe, you can usually see where your heel is worn down in a certain place, so this print had that same feature in it and also crushed in the middle of the foot print was the fossil of a trilobyte. Now a trilobyte is a shellfish that existed about 500 million years ago in what's called the Cambrian Period." -- Michael A. Cremo, author, March 19th 2008