Interesting Duck Creek formation ammonites

[Shaun-DFW Fossils]

At two different times this year (but at the same basic location), I found sense interesting ammonites that both contained other ammonites inside. This is near Johnson/Tarrant County borders in North Texas.  The first shown is an eopachydiscus in fairly rough shape that has a hamite embedded. The second is a mortoniceras with two extremely tiny mortoniceras ammonites visible inside. I’m guessing the smaller ones settled on the ocean floor after the larger ones and actually ended up inside those larger ammonites? I am not an expert on these so I appreciate your input!

[Ludwigia]

As you probably already know, it's not uncommon to find such assemblages in outcrops where fossil shells were probably originally swept together by the ocean currents before burial.