Interpretation

Fig. \ref{927199} shows a green line highlighting what we believe is the top of the igneous basement. Notice that above this line reflectors are continuous and smooth and we interpret them as sedimentary layers. The sedimentary layer thins as the offset increases until the igneous rock breaks through forming a peak and additional high dipping structures.  Afterward the sedimentary layer begins to thicken again . Notice that intra-basement reflectors are discontinuous and that deeper reflectors become weaker. The discontinuous reflectors can be interpreted as coming from lava flows that deposited at different moments,  which is the same way the Tamu Massif originated.