"Hole Drilled to Bottom of Earth's Crust, Breakthrough to Mantle Looms" reports:
Already the types of rocks recovered show that conventional interpretation of Earth's evolution are "oversimplifying many of the features of the ocean's crust," said expedition leader Jay Miller of Texas A&M University. "Each time we drill a hole, we learn that Earth's structure is more complex. Our understanding of how the Earth evolved is changing accordingly."
Barbara John, a different scientists involved, continues:
"We need to evaluate all the data we have from the cruise and re-analyze the seismic data, to determine whether it's better to deepen the current hole or drill elsewhere, or maybe even collect additional seismic data to better constrain where to drill," John told LiveScience. "Our major result is that we've recovered the lower crust for the first time and have confirmed that the Earth's crust at this locality is more complicated than we thought."