Intrusive igneous bodies that cut across existing sedimentary beds are said to be discordant.

Here's why:

* Discordant means "not in harmony" or "not in agreement." In geology, it refers to intrusions that cut across the existing rock layers (strata).

* Concordant intrusions, on the other hand, are parallel to the existing rock layers.

Some common examples of discordant igneous intrusions include:

* Dikes: Tabular, sheet-like intrusions that cut across existing rock layers.

* Sills: Tabular intrusions that are parallel to the bedding planes of the existing rock layers, but they are still considered discordant if they intrude between layers.

* Stocks and Batholiths: Large, irregular-shaped intrusions that can cut across existing rock layers.

Let me know if you have any other geological questions!