What kind of wood is my floor?

Hudson Valley, NY built around 1920. I’ve got to sink about $15k into new basement supports before I can repair the floor but I have no idea what kind of wood it is…Or how to fix it.

Hudson Valley, NY built around 1920. I’ve got to sink about $15k into new basement supports before I can repair the floor but I have no idea what kind of wood it is…Or how to fix it.