"It occurs in a reddish-brown, mudstone interval referred to as the upper member of the Lunde Formation ( reservoir zone L03 ; cf. Diesen et al. 1995) (Fig. 2). The mudstone is composed of dominantly compound and cumulative paleosols that formed in distal to fluvial channels in a flood-plain forming the uppermost part of the upper member of the Lunde Formation"
So the mudstone the fossil was deposited in was formed in a floodplain. On land.
"...the whole area was flooded during a marine transgression from the north and south in Late Sinemurian - Early Pliensbachian time (Nystuen & Fält 1995)
A marine transgression isn't a "tsunami-like flow", it's caused by the sea level rising or the land subsiding, and it takes ages.
So the paper says a dinosaur lived and died on land, became fossilized, and subsequently the shoreline changed and the deposit ended up underwater.
And from this we get that secular science is baffled.
Unless they found a Chevy Suburban down there too, I refuse to believe that sea levels rose and fell.
+1