Complex sentence: The northernmost portion of the Northern Cordilleran Volcanic Province extends just across the Alaska-Yukon border into the Southeast Fairbanks Census Area of eastcentral Alaska where a small group of volcanics lie in the middle of the metamorphic and granitic upland of the Yukon-Tanana Terrane.
Split into simpler sentences: The northernmost portion of the Northern Cordilleran Volcanic Province extends just across the Alaska-Yukon border into the Southeast Fairbanks Census Area of eastcentral Alaska. Here, a small group of volcanics lie in the middle of the metamorphic and granitic composed upland of the Yukon-Tanana Terrane.