What makes Etruscan burial practices so unusual and why archaeologists are so thankful for their practices?

What makes Etruscan burial practices so unusual and why archaeologists are so thankful for their practices?

The legacy of the Etruscans on Roman civilization is difficult to overestimate. Can you discuss what makes Etruscan burial practices so unusual and why archaeologists are so thankful for their practices? Please use 2 references from JSTOR.